202020102100 has 36 divisors (see below), whose sum is σ = 457443784224. Its totient is φ = 77294646880.

The previous prime is 202020102073. The next prime is 202020102101. The reversal of 202020102100 is 1201020202.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202020102101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43915114 + ... + 43919713.

It is an arithmetic number, because the mean of its divisors is an integer number (12706771784).

Almost surely, 2^202020102100 is an apocalyptic number.

202020102100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202020102100 is an abundant number, since it is smaller than the sum of its proper divisors (255423682124).

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

202020102100 is a wasteful number, since it uses less digits than its factorization.

202020102100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87834864 (or 87834857 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 202020102100 its reverse (1201020202), we get a palindrome (203221122302).

It can be divided in two parts, 202020102 and 100, that added together give a palindrome (202020202).

The spelling of 202020102100 in words is "two hundred two billion, twenty million, one hundred two thousand, one hundred".