123982445721 has 16 divisors (see below), whose sum is σ = 171173108160. Its totient is φ = 79728801600.

The previous prime is 123982445711. The next prime is 123982445729. The reversal of 123982445721 is 127544289321.

It is not a de Polignac number, because 123982445721 - 2⁵ = 123982445689 is a prime.

It is a super-2 number, since 2×123982445721² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123982445729) 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, 586530 + ... + 769403.

It is an arithmetic number, because the mean of its divisors is an integer number (10698319260).

Almost surely, 2^123982445721 is an apocalyptic number.

It is an amenable number.

123982445721 is a deficient number, since it is larger than the sum of its proper divisors (47190662439).

123982445721 is a wasteful number, since it uses less digits than its factorization.

123982445721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357016.

The product of its digits is 967680, while the sum is 48.

The spelling of 123982445721 in words is "one hundred twenty-three billion, nine hundred eighty-two million, four hundred forty-five thousand, seven hundred twenty-one".