121331200121 has 16 divisors (see below), whose sum is σ = 124233974400. Its totient is φ = 118459456128.

The previous prime is 121331200097. The next prime is 121331200129. The reversal of 121331200121 is 121002133121.

It is not a de Polignac number, because 121331200121 - 2⁶ = 121331200057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121331200121.

It is not an unprimeable number, because it can be changed into a prime (121331200129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5103500 + ... + 5127218.

It is an arithmetic number, because the mean of its divisors is an integer number (7764623400).

Almost surely, 2^121331200121 is an apocalyptic number.

It is an amenable number.

121331200121 is a deficient number, since it is larger than the sum of its proper divisors (2902774279).

121331200121 is a wasteful number, since it uses less digits than its factorization.

121331200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24368.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 121331200121 its reverse (121002133121), we get a palindrome (242333333242).

The spelling of 121331200121 in words is "one hundred twenty-one billion, three hundred thirty-one million, two hundred thousand, one hundred twenty-one".