21030113130 has 128 divisors (see below), whose sum is σ = 55064572416. Its totient is φ = 5109350400.

The previous prime is 21030113123. The next prime is 21030113141. The reversal of 21030113130 is 3131103012.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23870290 + ... + 23871170.

It is an arithmetic number, because the mean of its divisors is an integer number (430191972).

Almost surely, 2^21030113130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21030113130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27532286208).

21030113130 is an abundant number, since it is smaller than the sum of its proper divisors (34034459286).

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

21030113130 is a wasteful number, since it uses less digits than its factorization.

21030113130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632.

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

Adding to 21030113130 its reverse (3131103012), we get a palindrome (24161216142).

The spelling of 21030113130 in words is "twenty-one billion, thirty million, one hundred thirteen thousand, one hundred thirty".