202102012120121 has 4 divisors (see below), whose sum is σ = 202102274899200. Its totient is φ = 202101749341044.

The previous prime is 202102012120109. The next prime is 202102012120133. The reversal of 202102012120121 is 121021210201202.

202102012120121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (202102012120109) and next prime (202102012120133).

It is a cyclic number.

It is not a de Polignac number, because 202102012120121 - 2³⁴ = 202084832250937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202102012120121.

It is not an unprimeable number, because it can be changed into a prime (202102012122121) 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, 130232501 + ... + 131775218.

It is an arithmetic number, because the mean of its divisors is an integer number (50525568724800).

Almost surely, 2^{202102012120121} is an apocalyptic number.

It is an amenable number.

202102012120121 is a deficient number, since it is larger than the sum of its proper divisors (262779079).

202102012120121 is an equidigital number, since it uses as much as digits as its factorization.

202102012120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262779078.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 202102012120121 its reverse (121021210201202), we get a palindrome (323123222321323).

The spelling of 202102012120121 in words is "two hundred two trillion, one hundred two billion, twelve million, one hundred twenty thousand, one hundred twenty-one".