202121322102 has 48 divisors (see below), whose sum is σ = 503805449472. Its totient is φ = 57366500400.

The previous prime is 202121322043. The next prime is 202121322113. The reversal of 202121322102 is 201223121202.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5292688 + ... + 5330739.

It is an arithmetic number, because the mean of its divisors is an integer number (10495946864).

Almost surely, 2^202121322102 is an apocalyptic number.

202121322102 is an abundant number, since it is smaller than the sum of its proper divisors (301684127370).

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

202121322102 is a wasteful number, since it uses less digits than its factorization.

202121322102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10623593 (or 10623590 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 202121322102 its reverse (201223121202), we get a palindrome (403344443304).

Subtracting from 202121322102 its reverse (201223121202), we obtain a square (898200900 = 29970²).

The spelling of 202121322102 in words is "two hundred two billion, one hundred twenty-one million, three hundred twenty-two thousand, one hundred two".