123321203012120 has 32 divisors (see below), whose sum is σ = 287040731151600. Its totient is φ = 47627499093888.

The previous prime is 123321203012057. The next prime is 123321203012131. The reversal of 123321203012120 is 21210302123321.

It is a super-2 number, since 2×123321203012120² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53155689794 + ... + 53155692113.

Almost surely, 2^{123321203012120} is an apocalyptic number.

123321203012120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123321203012120 is an abundant number, since it is smaller than the sum of its proper divisors (163719528139480).

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

123321203012120 is a wasteful number, since it uses less digits than its factorization.

123321203012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106311381947 (or 106311381943 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 123321203012120 its reverse (21210302123321), we get a palindrome (144531505135441).

The spelling of 123321203012120 in words is "one hundred twenty-three trillion, three hundred twenty-one billion, two hundred three million, twelve thousand, one hundred twenty".