123031321111240 has 32 divisors (see below), whose sum is σ = 277040345904000. Its totient is φ = 49173439839424.

The previous prime is 123031321111229. The next prime is 123031321111249. The reversal of 123031321111240 is 42111123130321.

It is not an unprimeable number, because it can be changed into a prime (123031321111249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1221467920 + ... + 1221568639.

It is an arithmetic number, because the mean of its divisors is an integer number (8657510809500).

Almost surely, 2^{123031321111240} is an apocalyptic number.

123031321111240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123031321111240 is an abundant number, since it is smaller than the sum of its proper divisors (154009024792760).

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

123031321111240 is a wasteful number, since it uses less digits than its factorization.

123031321111240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443037829 (or 2443037825 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 123031321111240 its reverse (42111123130321), we get a palindrome (165142444241561).

The spelling of 123031321111240 in words is "one hundred twenty-three trillion, thirty-one billion, three hundred twenty-one million, one hundred eleven thousand, two hundred forty".