123020311312 has 40 divisors (see below), whose sum is σ = 241722459576. Its totient is φ = 60641058816.

The previous prime is 123020311307. The next prime is 123020311327. The reversal of 123020311312 is 213113020321.

It can be written as a sum of positive squares in 4 ways, for example, as 40262830336 + 82757480976 = 200656^2 + 287676^2 .

It is a super-2 number, since 2×123020311312² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123020311312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2801268 + ... + 2844844.

Almost surely, 2^123020311312 is an apocalyptic number.

It is an amenable number.

123020311312 is a deficient number, since it is larger than the sum of its proper divisors (118702148264).

123020311312 is a wasteful number, since it uses less digits than its factorization.

123020311312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46075 (or 46069 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 123020311312 its reverse (213113020321), we get a palindrome (336133331633).

The spelling of 123020311312 in words is "one hundred twenty-three billion, twenty million, three hundred eleven thousand, three hundred twelve".