123220112312 has 64 divisors (see below), whose sum is σ = 258024756960. Its totient is φ = 54694656000.

The previous prime is 123220112263. The next prime is 123220112333. The reversal of 123220112312 is 213211022321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 553868 + ... + 743780.

Almost surely, 2^123220112312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123220112312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129012378480).

123220112312 is an abundant number, since it is smaller than the sum of its proper divisors (134804644648).

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

123220112312 is a wasteful number, since it uses less digits than its factorization.

123220112312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190104 (or 190100 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 123220112312 its reverse (213211022321), we get a palindrome (336431134633).

It can be divided in two parts, 123220 and 112312, that added together give a palindrome (235532).

The spelling of 123220112312 in words is "one hundred twenty-three billion, two hundred twenty million, one hundred twelve thousand, three hundred twelve".