121113331111021 has 32 divisors (see below), whose sum is σ = 131583359831040. Its totient is φ = 111128856174336.

The previous prime is 121113331111013. The next prime is 121113331111043. The reversal of 121113331111021 is 120111133311121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121113331111021 - 2³ = 121113331111013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121113331110983 and 121113331111001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121113331111001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1110699915 + ... + 1110808951.

It is an arithmetic number, because the mean of its divisors is an integer number (4111979994720).

Almost surely, 2^{121113331111021} is an apocalyptic number.

It is an amenable number.

121113331111021 is a deficient number, since it is larger than the sum of its proper divisors (10470028720019).

121113331111021 is a wasteful number, since it uses less digits than its factorization.

121113331111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119853.

The product of its (nonzero) digits is 108, while the sum is 22.

Adding to 121113331111021 its reverse (120111133311121), we get a palindrome (241224464422142).

The spelling of 121113331111021 in words is "one hundred twenty-one trillion, one hundred thirteen billion, three hundred thirty-one million, one hundred eleven thousand, twenty-one".