123031132144520 has 64 divisors (see below), whose sum is σ = 285061912787520. Its totient is φ = 47761811645184.

The previous prime is 123031132144517. The next prime is 123031132144537. The reversal of 123031132144520 is 25441231130321.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227531642 + ... + 228071721.

It is an arithmetic number, because the mean of its divisors is an integer number (4454092387305).

Almost surely, 2^{123031132144520} is an apocalyptic number.

123031132144520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123031132144520 is an abundant number, since it is smaller than the sum of its proper divisors (162030780643000).

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

123031132144520 is a wasteful number, since it uses less digits than its factorization.

123031132144520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455603574 (or 455603570 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 123031132144520 its reverse (25441231130321), we get a palindrome (148472363274841).

The spelling of 123031132144520 in words is "one hundred twenty-three trillion, thirty-one billion, one hundred thirty-two million, one hundred forty-four thousand, five hundred twenty".