123992071021 has 24 divisors (see below), whose sum is σ = 155356938240. Its totient is φ = 98087062752.

The previous prime is 123992071003. The next prime is 123992071039. The reversal of 123992071021 is 120170299321.

It is an interprime number because it is at equal distance from previous prime (123992071003) and next prime (123992071039).

It is not a de Polignac number, because 123992071021 - 2⁵ = 123992070989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123992071051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4929940 + ... + 4955026.

It is an arithmetic number, because the mean of its divisors is an integer number (6473205760).

Almost surely, 2^123992071021 is an apocalyptic number.

It is an amenable number.

123992071021 is a deficient number, since it is larger than the sum of its proper divisors (31364867219).

123992071021 is a wasteful number, since it uses less digits than its factorization.

123992071021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32873 (or 32866 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 37.

The spelling of 123992071021 in words is "one hundred twenty-three billion, nine hundred ninety-two million, seventy-one thousand, twenty-one".