121121021200 has 60 divisors (see below), whose sum is σ = 291046153600. Its totient is φ = 48439601280.

The previous prime is 121121021149. The next prime is 121121021207. The reversal of 121121021200 is 2120121121.

It is not an unprimeable number, because it can be changed into a prime (121121021207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2455177 + ... + 2504023.

Almost surely, 2^121121021200 is an apocalyptic number.

121121021200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121121021200 is an abundant number, since it is smaller than the sum of its proper divisors (169925132400).

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

121121021200 is a wasteful number, since it uses less digits than its factorization.

121121021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55064 (or 55053 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121121021200 its reverse (2120121121), we get a palindrome (123241142321).

The spelling of 121121021200 in words is "one hundred twenty-one billion, one hundred twenty-one million, twenty-one thousand, two hundred".