21200000202 has 12 divisors (see below), whose sum is σ = 45933333810. Its totient is φ = 7066666728.

The previous prime is 21200000141. The next prime is 21200000219. The reversal of 21200000202 is 20200000212.

It can be written as a sum of positive squares in only one way, i.e., 14097050361 + 7102949841 = 118731^2 + 84279^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 588888877 + ... + 588888912.

Almost surely, 2^21200000202 is an apocalyptic number.

21200000202 is an abundant number, since it is smaller than the sum of its proper divisors (24733333608).

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

21200000202 is a wasteful number, since it uses less digits than its factorization.

21200000202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177777797 (or 1177777794 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 21200000202 its reverse (20200000212), we get a palindrome (41400000414).

The spelling of 21200000202 in words is "twenty-one billion, two hundred million, two hundred two", and thus it is an aban number.