2122551305400 has 192 divisors, whose sum is σ = 6943507372800. Its totient is φ = 534885120000.

The previous prime is 2122551305393. The next prime is 2122551305411. The reversal of 2122551305400 is 45031552212.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4339245 + ... + 4803555.

It is an arithmetic number, because the mean of its divisors is an integer number (36164100900).

Almost surely, 2^{2122551305400} is an apocalyptic number.

2122551305400 is a gapful number since it is divisible by the number (20) 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 2122551305400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3471753686400).

2122551305400 is an abundant number, since it is smaller than the sum of its proper divisors (4820956067400).

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

2122551305400 is a wasteful number, since it uses less digits than its factorization.

2122551305400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464750 (or 464741 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 2122551305400 its reverse (45031552212), we get a palindrome (2167582857612).

The spelling of 2122551305400 in words is "two trillion, one hundred twenty-two billion, five hundred fifty-one million, three hundred five thousand, four hundred".