21275871202 has 16 divisors (see below), whose sum is σ = 32898218040. Its totient is φ = 10311936768.

The previous prime is 21275871181. The next prime is 21275871209. The reversal of 21275871202 is 20217857212.

It can be written as a sum of positive squares in 4 ways, for example, as 16843107961 + 4432763241 = 129781^2 + 66579^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (21275871209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514503 + ... + 554314.

Almost surely, 2^21275871202 is an apocalyptic number.

21275871202 is a deficient number, since it is larger than the sum of its proper divisors (11622346838).

21275871202 is a wasteful number, since it uses less digits than its factorization.

21275871202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069125.

The product of its (nonzero) digits is 31360, while the sum is 37.

The spelling of 21275871202 in words is "twenty-one billion, two hundred seventy-five million, eight hundred seventy-one thousand, two hundred two".