21202201168 has 40 divisors (see below), whose sum is σ = 44671272552. Its totient is φ = 9707839488.

The previous prime is 21202201093. The next prime is 21202201169. The reversal of 21202201168 is 86110220212.

It can be written as a sum of positive squares in 4 ways, for example, as 14344373824 + 6857827344 = 119768^2 + 82812^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202201169) 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, 1043305 + ... + 1063432.

Almost surely, 2^21202201168 is an apocalyptic number.

It is an amenable number.

21202201168 is an abundant number, since it is smaller than the sum of its proper divisors (23469071384).

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

21202201168 is a wasteful number, since it uses less digits than its factorization.

21202201168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106799 (or 2106793 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The spelling of 21202201168 in words is "twenty-one billion, two hundred two million, two hundred one thousand, one hundred sixty-eight".