123132231291 has 48 divisors (see below), whose sum is σ = 177412551680. Its totient is φ = 75828804480.

The previous prime is 123132231283. The next prime is 123132231337. The reversal of 123132231291 is 192132231321.

It is not a de Polignac number, because 123132231291 - 2³ = 123132231283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123132231251) 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, 9659400 + ... + 9672138.

Almost surely, 2^123132231291 is an apocalyptic number.

123132231291 is a deficient number, since it is larger than the sum of its proper divisors (54280320389).

123132231291 is a wasteful number, since it uses less digits than its factorization.

123132231291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12916 (or 12863 counting only the distinct ones).

The product of its digits is 3888, while the sum is 30.

Adding to 123132231291 its sum of digits (30), we get a palindrome (123132231321).

The spelling of 123132231291 in words is "one hundred twenty-three billion, one hundred thirty-two million, two hundred thirty-one thousand, two hundred ninety-one".