123020313012 has 36 divisors (see below), whose sum is σ = 314462044260. Its totient is φ = 40546019712.

The previous prime is 123020312971. The next prime is 123020313037. The reversal of 123020313012 is 210313020321.

It can be written as a sum of positive squares in 2 ways, for example, as 75402963216 + 47617349796 = 274596^2 + 218214^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19194723 + ... + 19201130.

It is an arithmetic number, because the mean of its divisors is an integer number (8735056785).

Almost surely, 2^123020313012 is an apocalyptic number.

123020313012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123020313012 is an abundant number, since it is smaller than the sum of its proper divisors (191441731248).

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

123020313012 is a wasteful number, since it uses less digits than its factorization.

123020313012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38395952 (or 38395947 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 123020313012 its reverse (210313020321), we get a palindrome (333333333333).

The spelling of 123020313012 in words is "one hundred twenty-three billion, twenty million, three hundred thirteen thousand, twelve".