21231130110 has 32 divisors (see below), whose sum is σ = 51480025632. Its totient is φ = 5603266560.

The previous prime is 21231130103. The next prime is 21231130121. The reversal of 21231130110 is 1103113212.

It is a happy number.

21231130110 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×21231130110² (a number of 21 digits) contains 22 as substring.

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 21231130110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3645051 + ... + 3650870.

It is an arithmetic number, because the mean of its divisors is an integer number (1608750801).

Almost surely, 2^21231130110 is an apocalyptic number.

21231130110 is an abundant number, since it is smaller than the sum of its proper divisors (30248895522).

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

21231130110 is a wasteful number, since it uses less digits than its factorization.

21231130110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7296028.

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

Adding to 21231130110 its reverse (1103113212), we get a palindrome (22334243322).

The spelling of 21231130110 in words is "twenty-one billion, two hundred thirty-one million, one hundred thirty thousand, one hundred ten".