21130230030 has 128 divisors (see below), whose sum is σ = 65700633600. Its totient is φ = 4223591424.

The previous prime is 21130230007. The next prime is 21130230059. The reversal of 21130230030 is 3003203112.

It is a super-2 number, since 2×21130230030² (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 junction number, because it is equal to n+sod(n) for n = 21130229991 and 21130230009.

It is a congruent number.

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, 151815 + ... + 255554.

It is an arithmetic number, because the mean of its divisors is an integer number (513286200).

Almost surely, 2^21130230030 is an apocalyptic number.

21130230030 is an abundant number, since it is smaller than the sum of its proper divisors (44570403570).

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

21130230030 is a wasteful number, since it uses less digits than its factorization.

21130230030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407418.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21130230030 its reverse (3003203112), we get a palindrome (24133433142).

The spelling of 21130230030 in words is "twenty-one billion, one hundred thirty million, two hundred thirty thousand, thirty".