21313120302 has 24 divisors (see below), whose sum is σ = 47888740536. Its totient is φ = 7104373272.

The previous prime is 21313120273. The next prime is 21313120313. The reversal of 21313120302 is 20302131312.

21313120302 is a `hidden beast` number, since 21 + 31 + 312 + 0 + 302 = 666.

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 11 ways as a sum of consecutive naturals, for example, 21926593 + ... + 21927564.

It is an arithmetic number, because the mean of its divisors is an integer number (1995364189).

Almost surely, 2^21313120302 is an apocalyptic number.

21313120302 is an abundant number, since it is smaller than the sum of its proper divisors (26575620234).

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

21313120302 is an equidigital number, since it uses as much as digits as its factorization.

21313120302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43854174 (or 43854162 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21313120302 its reverse (20302131312), we get a palindrome (41615251614).

The spelling of 21313120302 in words is "twenty-one billion, three hundred thirteen million, one hundred twenty thousand, three hundred two".