121002112121021 has 4 divisors (see below), whose sum is σ = 121321378908000. Its totient is φ = 120682845334044.

The previous prime is 121002112120999. The next prime is 121002112121117. The reversal of 121002112121021 is 120121211200121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121002112121021 - 2³⁸ = 120727234214077 is a prime.

It is a super-2 number, since 2×121002112121021² (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 (121002112171021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159633392921 + ... + 159633393678.

It is an arithmetic number, because the mean of its divisors is an integer number (30330344727000).

Almost surely, 2^{121002112121021} is an apocalyptic number.

It is an amenable number.

121002112121021 is a deficient number, since it is larger than the sum of its proper divisors (319266786979).

121002112121021 is an equidigital number, since it uses as much as digits as its factorization.

121002112121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319266786978.

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

Adding to 121002112121021 its reverse (120121211200121), we get a palindrome (241123323321142).

The spelling of 121002112121021 in words is "one hundred twenty-one trillion, two billion, one hundred twelve million, one hundred twenty-one thousand, twenty-one".