21130354132 has 12 divisors (see below), whose sum is σ = 36994784596. Its totient is φ = 10560415680.

The previous prime is 21130354121. The next prime is 21130354177. The reversal of 21130354132 is 23145303112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7122684816 + 14007669316 = 84396^2 + 118354^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21130354097 and 21130354106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1180353 + ... + 1198120.

Almost surely, 2^21130354132 is an apocalyptic number.

It is an amenable number.

21130354132 is a deficient number, since it is larger than the sum of its proper divisors (15864430464).

21130354132 is a wasteful number, since it uses less digits than its factorization.

21130354132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2380698 (or 2380696 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 21130354132 its reverse (23145303112), we get a palindrome (44275657244).

The spelling of 21130354132 in words is "twenty-one billion, one hundred thirty million, three hundred fifty-four thousand, one hundred thirty-two".