21130332124 has 36 divisors (see below), whose sum is σ = 40720145032. Its totient is φ = 9587017440.

The previous prime is 21130332103. The next prime is 21130332143. The reversal of 21130332124 is 42123303112.

It is a super-3 number, since 3×21130332124³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 21130332095 and 21130332104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 224842 + ... + 304654.

Almost surely, 2^21130332124 is an apocalyptic number.

It is an amenable number.

21130332124 is a deficient number, since it is larger than the sum of its proper divisors (19589812908).

21130332124 is a wasteful number, since it uses less digits than its factorization.

21130332124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80386 (or 80373 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21130332124 its reverse (42123303112), we get a palindrome (63253635236).

The spelling of 21130332124 in words is "twenty-one billion, one hundred thirty million, three hundred thirty-two thousand, one hundred twenty-four".