123120203312 has 20 divisors (see below), whose sum is σ = 243046252080. Its totient is φ = 60398589888.

The previous prime is 123120203303. The next prime is 123120203321. The reversal of 123120203312 is 213302021321.

It is an interprime number because it is at equal distance from previous prime (123120203303) and next prime (123120203321).

It is a super-3 number, since 3×123120203312³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72593612 + ... + 72595307.

It is an arithmetic number, because the mean of its divisors is an integer number (12152312604).

Almost surely, 2^123120203312 is an apocalyptic number.

It is an amenable number.

123120203312 is a deficient number, since it is larger than the sum of its proper divisors (119926048768).

123120203312 is a wasteful number, since it uses less digits than its factorization.

123120203312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145188980 (or 145188974 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 123120203312 its reverse (213302021321), we get a palindrome (336422224633).

The spelling of 123120203312 in words is "one hundred twenty-three billion, one hundred twenty million, two hundred three thousand, three hundred twelve".