21030133110 has 96 divisors (see below), whose sum is σ = 58841953632. Its totient is φ = 4796305920.

The previous prime is 21030133093. The next prime is 21030133129. The reversal of 21030133110 is 1133103012.

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 21030133110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 662154 + ... + 693186.

It is an arithmetic number, because the mean of its divisors is an integer number (612937017).

Almost surely, 2^21030133110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21030133110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29420976816).

21030133110 is an abundant number, since it is smaller than the sum of its proper divisors (37811820522).

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

21030133110 is a wasteful number, since it uses less digits than its factorization.

21030133110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31518 (or 31511 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 21030133110 its reverse (1133103012), we get a palindrome (22163236122).

The spelling of 21030133110 in words is "twenty-one billion, thirty million, one hundred thirty-three thousand, one hundred ten".