123072503281 has 48 divisors (see below), whose sum is σ = 159090484224. Its totient is φ = 92686032000.

The previous prime is 123072503273. The next prime is 123072503311. The reversal of 123072503281 is 182305270321.

It is not a de Polignac number, because 123072503281 - 2³ = 123072503273 is a prime.

It is a super-2 number, since 2×123072503281² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123072503581) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5322976 + ... + 5346046.

It is an arithmetic number, because the mean of its divisors is an integer number (3314385088).

Almost surely, 2^123072503281 is an apocalyptic number.

It is an amenable number.

123072503281 is a deficient number, since it is larger than the sum of its proper divisors (36017980943).

123072503281 is a wasteful number, since it uses less digits than its factorization.

123072503281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23214 (or 23183 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 123072503281 in words is "one hundred twenty-three billion, seventy-two million, five hundred three thousand, two hundred eighty-one".