121031122200021 has 24 divisors (see below), whose sum is σ = 200753376539040. Its totient is φ = 69491553415200.

The previous prime is 121031122200019. The next prime is 121031122200137. The reversal of 121031122200021 is 120002221130121.

It is not a de Polignac number, because 121031122200021 - 2¹ = 121031122200019 is a prime.

It is a super-2 number, since 2×121031122200021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121031122199967 and 121031122200003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121031122202021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32172013590 + ... + 32172017351.

It is an arithmetic number, because the mean of its divisors is an integer number (8364724022460).

Almost surely, 2^{121031122200021} is an apocalyptic number.

121031122200021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121031122200021 is a deficient number, since it is larger than the sum of its proper divisors (79722254339019).

121031122200021 is a wasteful number, since it uses less digits than its factorization.

121031122200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64344030977 (or 64344030974 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121031122200021 its reverse (120002221130121), we get a palindrome (241033343330142).

The spelling of 121031122200021 in words is "one hundred twenty-one trillion, thirty-one billion, one hundred twenty-two million, two hundred thousand, twenty-one".