121210220120001 has 16 divisors (see below), whose sum is σ = 162547510665600. Its totient is φ = 80341105160448.

The previous prime is 121210220119819. The next prime is 121210220120021. The reversal of 121210220120001 is 100021022012121.

It is not a de Polignac number, because 121210220120001 - 2¹⁵ = 121210220087233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121210220120021) 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, 153814936 + ... + 154600953.

It is an arithmetic number, because the mean of its divisors is an integer number (10159219416600).

Almost surely, 2^{121210220120001} is an apocalyptic number.

It is an amenable number.

121210220120001 is a deficient number, since it is larger than the sum of its proper divisors (41337290545599).

121210220120001 is a wasteful number, since it uses less digits than its factorization.

121210220120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308416648.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121210220120001 its reverse (100021022012121), we get a palindrome (221231242132122).

The spelling of 121210220120001 in words is "one hundred twenty-one trillion, two hundred ten billion, two hundred twenty million, one hundred twenty thousand, one".