202112210100 has 72 divisors (see below), whose sum is σ = 599040908928. Its totient is φ = 52582035200.

The previous prime is 202112210087. The next prime is 202112210107. The reversal of 202112210100 is 1012211202.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202112210107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8203644 + ... + 8228243.

It is an arithmetic number, because the mean of its divisors is an integer number (8320012624).

Almost surely, 2^202112210100 is an apocalyptic number.

202112210100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202112210100 is an abundant number, since it is smaller than the sum of its proper divisors (396928698828).

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

202112210100 is a wasteful number, since it uses less digits than its factorization.

202112210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16431945 (or 16431938 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 202112210100 its reverse (1012211202), we get a palindrome (203124421302).

The spelling of 202112210100 in words is "two hundred two billion, one hundred twelve million, two hundred ten thousand, one hundred".