121231333121 has 16 divisors (see below), whose sum is σ = 127224518400. Its totient is φ = 115299138240.

The previous prime is 121231333117. The next prime is 121231333133. The reversal of 121231333121 is 121333132121.

It is a cyclic number.

It is not a de Polignac number, because 121231333121 - 2² = 121231333117 is a prime.

It is a super-2 number, since 2×121231333121² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (121231333141) 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 15 ways as a sum of consecutive naturals, for example, 7374491 + ... + 7390911.

It is an arithmetic number, because the mean of its divisors is an integer number (7951532400).

Almost surely, 2^121231333121 is an apocalyptic number.

It is an amenable number.

121231333121 is a deficient number, since it is larger than the sum of its proper divisors (5993185279).

121231333121 is a wasteful number, since it uses less digits than its factorization.

121231333121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18256.

The product of its digits is 648, while the sum is 23.

Adding to 121231333121 its reverse (121333132121), we get a palindrome (242564465242).

The spelling of 121231333121 in words is "one hundred twenty-one billion, two hundred thirty-one million, three hundred thirty-three thousand, one hundred twenty-one".