121313101021 has 16 divisors (see below), whose sum is σ = 140933122560. Its totient is φ = 102265879680.

The previous prime is 121313100977. The next prime is 121313101123. The reversal of 121313101021 is 120101313121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121313101021 - 2⁹ = 121313100509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121313100986 and 121313101004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121313101321) 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, 6915900 + ... + 6933418.

It is an arithmetic number, because the mean of its divisors is an integer number (8808320160).

Almost surely, 2^121313101021 is an apocalyptic number.

It is an amenable number.

121313101021 is a deficient number, since it is larger than the sum of its proper divisors (19620021539).

121313101021 is a wasteful number, since it uses less digits than its factorization.

121313101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33804.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 121313101021 its reverse (120101313121), we get a palindrome (241414414142).

The spelling of 121313101021 in words is "one hundred twenty-one billion, three hundred thirteen million, one hundred one thousand, twenty-one".