21255522202 has 8 divisors (see below), whose sum is σ = 31897454112. Its totient is φ = 10623037500.

The previous prime is 21255522187. The next prime is 21255522203. The reversal of 21255522202 is 20222555212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21255522203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2356174 + ... + 2365177.

It is an arithmetic number, because the mean of its divisors is an integer number (3987181764).

Almost surely, 2^21255522202 is an apocalyptic number.

21255522202 is a deficient number, since it is larger than the sum of its proper divisors (10641931910).

21255522202 is a wasteful number, since it uses less digits than its factorization.

21255522202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4723604.

The product of its (nonzero) digits is 8000, while the sum is 28.

The spelling of 21255522202 in words is "twenty-one billion, two hundred fifty-five million, five hundred twenty-two thousand, two hundred two".