121237242800 has 120 divisors (see below), whose sum is σ = 304905341952. Its totient is φ = 46269216000.

The previous prime is 121237242799. The next prime is 121237242869. The reversal of 121237242800 is 8242732121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 811547 + ... + 949253.

Almost surely, 2^121237242800 is an apocalyptic number.

121237242800 is a gapful number since it is divisible by the number (10) 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 121237242800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152452670976).

121237242800 is an abundant number, since it is smaller than the sum of its proper divisors (183668099152).

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

121237242800 is a wasteful number, since it uses less digits than its factorization.

121237242800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137827 (or 137816 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

Adding to 121237242800 its reverse (8242732121), we get a palindrome (129479974921).

The spelling of 121237242800 in words is "one hundred twenty-one billion, two hundred thirty-seven million, two hundred forty-two thousand, eight hundred".