21021224110 has 16 divisors (see below), whose sum is σ = 38552132736. Its totient is φ = 8249838688.

The previous prime is 21021224051. The next prime is 21021224129. The reversal of 21021224110 is 1142212012.

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, 19830814 + ... + 19831873.

It is an arithmetic number, because the mean of its divisors is an integer number (2409508296).

Almost surely, 2^21021224110 is an apocalyptic number.

21021224110 is a deficient number, since it is larger than the sum of its proper divisors (17530908626).

21021224110 is a wasteful number, since it uses less digits than its factorization.

21021224110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39662747.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21021224110 its reverse (1142212012), we get a palindrome (22163436122).

The spelling of 21021224110 in words is "twenty-one billion, twenty-one million, two hundred twenty-four thousand, one hundred ten".