21310221150 has 60 divisors (see below), whose sum is σ = 59210855352. Its totient is φ = 5682724560.

The previous prime is 21310221113. The next prime is 21310221161. The reversal of 21310221150 is 5112201312.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2626842 + ... + 2634941.

Almost surely, 2^21310221150 is an apocalyptic number.

21310221150 is an abundant number, since it is smaller than the sum of its proper divisors (37900634202).

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

21310221150 is a wasteful number, since it uses less digits than its factorization.

21310221150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5261807 (or 5261793 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 21310221150 its reverse (5112201312), we get a palindrome (26422422462).

The spelling of 21310221150 in words is "twenty-one billion, three hundred ten million, two hundred twenty-one thousand, one hundred fifty".