202120222100 has 36 divisors (see below), whose sum is σ = 439796059584. Its totient is φ = 80627779680.

The previous prime is 202120222039. The next prime is 202120222121. The reversal of 202120222100 is 1222021202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2716982 + ... + 2790381.

Almost surely, 2^202120222100 is an apocalyptic number.

202120222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202120222100 is an abundant number, since it is smaller than the sum of its proper divisors (237675837484).

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

202120222100 is a wasteful number, since it uses less digits than its factorization.

202120222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5507744 (or 5507737 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 202120222100 its reverse (1222021202), we get a palindrome (203342243302).

The spelling of 202120222100 in words is "two hundred two billion, one hundred twenty million, two hundred twenty-two thousand, one hundred".