210113022121 has 4 divisors (see below), whose sum is σ = 212991282772. Its totient is φ = 207234761472.

The previous prime is 210113022107. The next prime is 210113022131. The reversal of 210113022121 is 121220311012.

210113022121 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.

It can be written as a sum of positive squares in 2 ways, for example, as 78518204521 + 131594817600 = 280211^2 + 362760^2 .

It is a cyclic number.

It is not a de Polignac number, because 210113022121 - 2²⁷ = 209978804393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210113022095 and 210113022104.

It is not an unprimeable number, because it can be changed into a prime (210113022131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1439130216 + ... + 1439130361.

It is an arithmetic number, because the mean of its divisors is an integer number (53247820693).

Almost surely, 2^210113022121 is an apocalyptic number.

It is an amenable number.

210113022121 is a deficient number, since it is larger than the sum of its proper divisors (2878260651).

210113022121 is an equidigital number, since it uses as much as digits as its factorization.

210113022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2878260650.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 210113022121 its reverse (121220311012), we get a palindrome (331333333133).

The spelling of 210113022121 in words is "two hundred ten billion, one hundred thirteen million, twenty-two thousand, one hundred twenty-one".