123031221013120 has 128 divisors (see below), whose sum is σ = 339466980585600. Its totient is φ = 41764487884800.

The previous prime is 123031221013111. The next prime is 123031221013121. The reversal of 123031221013120 is 21310122130321.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 123031221013091 and 123031221013100.

It is not an unprimeable number, because it can be changed into a prime (123031221013121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135499630 + ... + 136404589.

It is an arithmetic number, because the mean of its divisors is an integer number (2652085785825).

Almost surely, 2^{123031221013120} is an apocalyptic number.

123031221013120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123031221013120 is an abundant number, since it is smaller than the sum of its proper divisors (216435759572480).

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

123031221013120 is a wasteful number, since it uses less digits than its factorization.

123031221013120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271904346 (or 271904334 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 123031221013120 its reverse (21310122130321), we get a palindrome (144341343143441).

The spelling of 123031221013120 in words is "one hundred twenty-three trillion, thirty-one billion, two hundred twenty-one million, thirteen thousand, one hundred twenty".