21130032124 has 12 divisors (see below), whose sum is σ = 37011581824. Its totient is φ = 10555294464.

The previous prime is 21130032101. The next prime is 21130032163. The reversal of 21130032124 is 42123003112.

It is a happy number.

It is a super-2 number, since 2×21130032124² (a number of 21 digits) contains 22 as substring.

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, 2425509 + ... + 2434204.

Almost surely, 2^21130032124 is an apocalyptic number.

It is an amenable number.

21130032124 is a deficient number, since it is larger than the sum of its proper divisors (15881549700).

21130032124 is a wasteful number, since it uses less digits than its factorization.

21130032124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4860804 (or 4860802 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21130032124 its reverse (42123003112), we get a palindrome (63253035236).

The spelling of 21130032124 in words is "twenty-one billion, one hundred thirty million, thirty-two thousand, one hundred twenty-four".