121131233021 has 16 divisors (see below), whose sum is σ = 122341752000. Its totient is φ = 119927958528.

The previous prime is 121131233009. The next prime is 121131233051. The reversal of 121131233021 is 120332131121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121131233021 - 2²⁶ = 121064124157 is a prime.

It is a super-2 number, since 2×121131233021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121131232984 and 121131233002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121131233051) 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, 45247535 + ... + 45250211.

It is an arithmetic number, because the mean of its divisors is an integer number (7646359500).

Almost surely, 2^121131233021 is an apocalyptic number.

It is an amenable number.

121131233021 is a deficient number, since it is larger than the sum of its proper divisors (1210518979).

121131233021 is a wasteful number, since it uses less digits than its factorization.

121131233021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3868.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 121131233021 its reverse (120332131121), we get a palindrome (241463364142).

The spelling of 121131233021 in words is "one hundred twenty-one billion, one hundred thirty-one million, two hundred thirty-three thousand, twenty-one".