21031104130 has 16 divisors (see below), whose sum is σ = 38003291640. Its totient is φ = 8379707392.

The previous prime is 21031104091. The next prime is 21031104167. The reversal of 21031104130 is 3140113012.

It can be written as a sum of positive squares in 4 ways, for example, as 20709224649 + 321879481 = 143907^2 + 17941^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4089085 + ... + 4094224.

Almost surely, 2^21031104130 is an apocalyptic number.

21031104130 is a deficient number, since it is larger than the sum of its proper divisors (16972187510).

21031104130 is a wasteful number, since it uses less digits than its factorization.

21031104130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8183573.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21031104130 its reverse (3140113012), we get a palindrome (24171217142).

The spelling of 21031104130 in words is "twenty-one billion, thirty-one million, one hundred four thousand, one hundred thirty".