202021022100 has 72 divisors (see below), whose sum is σ = 609927837120. Its totient is φ = 51529998080.

The previous prime is 202021022069. The next prime is 202021022101. The reversal of 202021022100 is 1220120202.

202021022100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 (202021022101) 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, 14632305 + ... + 14646104.

It is an arithmetic number, because the mean of its divisors is an integer number (8471219960).

Almost surely, 2^202021022100 is an apocalyptic number.

202021022100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202021022100 is an abundant number, since it is smaller than the sum of its proper divisors (407906815020).

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

202021022100 is a wasteful number, since it uses less digits than its factorization.

202021022100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29278449 (or 29278442 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 202021022100 its reverse (1220120202), we get a palindrome (203241142302).

The spelling of 202021022100 in words is "two hundred two billion, twenty-one million, twenty-two thousand, one hundred".