121051200552 has 128 divisors (see below), whose sum is σ = 325181692800. Its totient is φ = 37414821888.

The previous prime is 121051200533. The next prime is 121051200559. The reversal of 121051200552 is 255002150121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (121051200559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36602883 + ... + 36606189.

It is an arithmetic number, because the mean of its divisors is an integer number (2540481975).

Almost surely, 2^121051200552 is an apocalyptic number.

121051200552 is a gapful number since it is divisible by the number (12) 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 121051200552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162590846400).

121051200552 is an abundant number, since it is smaller than the sum of its proper divisors (204130492248).

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

121051200552 is a wasteful number, since it uses less digits than its factorization.

121051200552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4635 (or 4631 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

Adding to 121051200552 its reverse (255002150121), we get a palindrome (376053350673).

The spelling of 121051200552 in words is "one hundred twenty-one billion, fifty-one million, two hundred thousand, five hundred fifty-two".