20202221202100 has 72 divisors (see below), whose sum is σ = 50597563298688. Its totient is φ = 6857896848000.

The previous prime is 20202221202043. The next prime is 20202221202187. The reversal of 20202221202100 is 120212220202.

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, 142802152 + ... + 142943551.

It is an arithmetic number, because the mean of its divisors is an integer number (702743934704).

Almost surely, 2^{20202221202100} is an apocalyptic number.

20202221202100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20202221202100 is an abundant number, since it is smaller than the sum of its proper divisors (30395342096588).

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

20202221202100 is a wasteful number, since it uses less digits than its factorization.

20202221202100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285745825 (or 285745818 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20202221202100 its reverse (120212220202), we get a palindrome (20322433422302).

The spelling of 20202221202100 in words is "twenty trillion, two hundred two billion, two hundred twenty-one million, two hundred two thousand, one hundred".