21013033124 has 24 divisors (see below), whose sum is σ = 38940380640. Its totient is φ = 9887351936.

The previous prime is 21013033099. The next prime is 21013033159. The reversal of 21013033124 is 42133031012.

It is a super-2 number, since 2×21013033124² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21013033096 and 21013033105.

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, 1041767 + ... + 1061745.

It is an arithmetic number, because the mean of its divisors is an integer number (1622515860).

Almost surely, 2^21013033124 is an apocalyptic number.

It is an amenable number.

21013033124 is a deficient number, since it is larger than the sum of its proper divisors (17927347516).

21013033124 is a wasteful number, since it uses less digits than its factorization.

21013033124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35467 (or 35465 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21013033124 its reverse (42133031012), we get a palindrome (63146064136).

The spelling of 21013033124 in words is "twenty-one billion, thirteen million, thirty-three thousand, one hundred twenty-four".