21303131202 has 24 divisors (see below), whose sum is σ = 46242122940. Its totient is φ = 7087914720.

The previous prime is 21303131159. The next prime is 21303131207. The reversal of 21303131202 is 20213130312.

It can be written as a sum of positive squares in 2 ways, for example, as 21269013921 + 34117281 = 145839^2 + 5841^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21303131207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1084077 + ... + 1103552.

Almost surely, 2^21303131202 is an apocalyptic number.

21303131202 is an abundant number, since it is smaller than the sum of its proper divisors (24938991738).

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

21303131202 is a wasteful number, since it uses less digits than its factorization.

21303131202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188178 (or 2188175 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21303131202 its reverse (20213130312), we get a palindrome (41516261514).

The spelling of 21303131202 in words is "twenty-one billion, three hundred three million, one hundred thirty-one thousand, two hundred two".