21202200100 has 36 divisors (see below), whose sum is σ = 46015523568. Its totient is φ = 8479636000.

The previous prime is 21202200091. The next prime is 21202200119. The reversal of 21202200100 is 100220212.

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

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, 998595 + ... + 1019605.

It is an arithmetic number, because the mean of its divisors is an integer number (1278208988).

Almost surely, 2^21202200100 is an apocalyptic number.

21202200100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202200100 is an abundant number, since it is smaller than the sum of its proper divisors (24813323468).

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

21202200100 is a wasteful number, since it uses less digits than its factorization.

21202200100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31116 (or 31109 counting only the distinct ones).

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

Adding to 21202200100 its reverse (100220212), we get a palindrome (21302420312).

The spelling of 21202200100 in words is "twenty-one billion, two hundred two million, two hundred thousand, one hundred".