21013331210 has 8 divisors (see below), whose sum is σ = 37823996196. Its totient is φ = 8405332480.

The previous prime is 21013331177. The next prime is 21013331327. The reversal of 21013331210 is 1213331012.

It can be written as a sum of positive squares in 2 ways, for example, as 20261529649 + 751801561 = 142343^2 + 27419^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050666551 + ... + 1050666570.

Almost surely, 2^21013331210 is an apocalyptic number.

21013331210 is a deficient number, since it is larger than the sum of its proper divisors (16810664986).

21013331210 is a wasteful number, since it uses less digits than its factorization.

21013331210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101333128.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21013331210 its reverse (1213331012), we get a palindrome (22226662222).

The spelling of 21013331210 in words is "twenty-one billion, thirteen million, three hundred thirty-one thousand, two hundred ten".