30921017124 has 48 divisors (see below), whose sum is σ = 73687199040. Its totient is φ = 10088770560.

The previous prime is 30921017123. The next prime is 30921017129. The reversal of 30921017124 is 42171012903.

It is a super-2 number, since 2×30921017124² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30921017091 and 30921017100.

It is not an unprimeable number, because it can be changed into a prime (30921017123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71244 + ... + 258684.

It is an arithmetic number, because the mean of its divisors is an integer number (1535149980).

Almost surely, 2^30921017124 is an apocalyptic number.

It is an amenable number.

30921017124 is an abundant number, since it is smaller than the sum of its proper divisors (42766181916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30921017124 is a wasteful number, since it uses less digits than its factorization.

30921017124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187740 (or 187738 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The spelling of 30921017124 in words is "thirty billion, nine hundred twenty-one million, seventeen thousand, one hundred twenty-four".