55121014205400 has 384 divisors, whose sum is σ = 201588447513600. Its totient is φ = 12283157913600.

The previous prime is 55121014205399. The next prime is 55121014205401. The reversal of 55121014205400 is 450241012155.

55121014205400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55121014205399) and next prime (55121014205401).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55121014205401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 19162192 + ... + 21850208.

It is an arithmetic number, because the mean of its divisors is an integer number (524969915400).

Almost surely, 2^{55121014205400} is an apocalyptic number.

55121014205400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55121014205400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100794223756800).

55121014205400 is an abundant number, since it is smaller than the sum of its proper divisors (146467433308200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55121014205400 is a wasteful number, since it uses less digits than its factorization.

55121014205400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2688299 (or 2688290 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

Adding to 55121014205400 its reverse (450241012155), we get a palindrome (55571255217555).

The spelling of 55121014205400 in words is "fifty-five trillion, one hundred twenty-one billion, fourteen million, two hundred five thousand, four hundred".