21201315022 has 16 divisors (see below), whose sum is σ = 31891991040. Its totient is φ = 10570685112.

The previous prime is 21201315013. The next prime is 21201315049. The reversal of 21201315022 is 22051310212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1413253 + ... + 1428175.

It is an arithmetic number, because the mean of its divisors is an integer number (1993249440).

Almost surely, 2^21201315022 is an apocalyptic number.

21201315022 is a deficient number, since it is larger than the sum of its proper divisors (10690676018).

21201315022 is a wasteful number, since it uses less digits than its factorization.

21201315022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16887.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 21201315022 its reverse (22051310212), we get a palindrome (43252625234).

The spelling of 21201315022 in words is "twenty-one billion, two hundred one million, three hundred fifteen thousand, twenty-two".