21130402110 has 64 divisors (see below), whose sum is σ = 53724384000. Its totient is φ = 5300521472.

The previous prime is 21130402103. The next prime is 21130402121. The reversal of 21130402110 is 1120403112.

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 21130402110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1060621 + ... + 1080359.

It is an arithmetic number, because the mean of its divisors is an integer number (839443500).

Almost surely, 2^21130402110 is an apocalyptic number.

21130402110 is an abundant number, since it is smaller than the sum of its proper divisors (32593981890).

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

21130402110 is a wasteful number, since it uses less digits than its factorization.

21130402110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21865.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21130402110 its reverse (1120403112), we get a palindrome (22250805222).

The spelling of 21130402110 in words is "twenty-one billion, one hundred thirty million, four hundred two thousand, one hundred ten".