121102121012021 has 32 divisors (see below), whose sum is σ = 123689140888320. Its totient is φ = 118540730880000.

The previous prime is 121102121012017. The next prime is 121102121012053. The reversal of 121102121012021 is 120210121201121.

It is not a de Polignac number, because 121102121012021 - 2² = 121102121012017 is a prime.

It is a super-2 number, since 2×121102121012021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121102121012071) 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 31 ways as a sum of consecutive naturals, for example, 13529447096 + ... + 13529456046.

It is an arithmetic number, because the mean of its divisors is an integer number (3865285652760).

Almost surely, 2^{121102121012021} is an apocalyptic number.

It is an amenable number.

121102121012021 is a deficient number, since it is larger than the sum of its proper divisors (2587019876299).

121102121012021 is a wasteful number, since it uses less digits than its factorization.

121102121012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11165.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121102121012021 its reverse (120210121201121), we get a palindrome (241312242213142).

The spelling of 121102121012021 in words is "one hundred twenty-one trillion, one hundred two billion, one hundred twenty-one million, twelve thousand, twenty-one".