210121013203122 has 64 divisors (see below), whose sum is σ = 497729854321920. Its totient is φ = 57860351867136.

The previous prime is 210121013203061. The next prime is 210121013203159. The reversal of 210121013203122 is 221302310121012.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

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, 154180773 + ... + 155537624.

It is an arithmetic number, because the mean of its divisors is an integer number (7777028973780).

Almost surely, 2^{210121013203122} is an apocalyptic number.

210121013203122 is an abundant number, since it is smaller than the sum of its proper divisors (287608841118798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210121013203122 is a wasteful number, since it uses less digits than its factorization.

210121013203122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309718995.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 210121013203122 its reverse (221302310121012), we get a palindrome (431423323324134).

The spelling of 210121013203122 in words is "two hundred ten trillion, one hundred twenty-one billion, thirteen million, two hundred three thousand, one hundred twenty-two".