121031401021 has 16 divisors (see below), whose sum is σ = 126746726400. Its totient is φ = 115354513648.

The previous prime is 121031401019. The next prime is 121031401027. The reversal of 121031401021 is 120104130121.

It is a cyclic number.

It is not a de Polignac number, because 121031401021 - 2¹ = 121031401019 is a prime.

It is a super-2 number, since 2×121031401021² (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 = 121031400986 and 121031401004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121031401027) 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, 8540940 + ... + 8555098.

It is an arithmetic number, because the mean of its divisors is an integer number (7921670400).

Almost surely, 2^121031401021 is an apocalyptic number.

It is an amenable number.

121031401021 is a deficient number, since it is larger than the sum of its proper divisors (5715325379).

121031401021 is a wasteful number, since it uses less digits than its factorization.

121031401021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15488.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121031401021 its reverse (120104130121), we get a palindrome (241135531142).

The spelling of 121031401021 in words is "one hundred twenty-one billion, thirty-one million, four hundred one thousand, twenty-one".