21113310210 has 16 divisors (see below), whose sum is σ = 50671944576. Its totient is φ = 5630216048.

The previous prime is 21113310193. The next prime is 21113310227. The reversal of 21113310210 is 1201331112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21113310193) and next prime (21113310227).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21113310210.

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, 351888474 + ... + 351888533.

It is an arithmetic number, because the mean of its divisors is an integer number (3166996536).

Almost surely, 2^21113310210 is an apocalyptic number.

21113310210 is an abundant number, since it is smaller than the sum of its proper divisors (29558634366).

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

21113310210 is a wasteful number, since it uses less digits than its factorization.

21113310210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703777017.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21113310210 its reverse (1201331112), we get a palindrome (22314641322).

The spelling of 21113310210 in words is "twenty-one billion, one hundred thirteen million, three hundred ten thousand, two hundred ten".