123123202312 has 32 divisors (see below), whose sum is σ = 255601775520. Its totient is φ = 55129789440.

The previous prime is 123123202271. The next prime is 123123202327. The reversal of 123123202312 is 213202321321.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10435353 + ... + 10447144.

It is an arithmetic number, because the mean of its divisors is an integer number (7987555485).

Almost surely, 2^123123202312 is an apocalyptic number.

It is an amenable number.

123123202312 is an abundant number, since it is smaller than the sum of its proper divisors (132478573208).

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

123123202312 is a wasteful number, since it uses less digits than its factorization.

123123202312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20882581 (or 20882577 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 123123202312 its reverse (213202321321), we get a palindrome (336325523633).

The spelling of 123123202312 in words is "one hundred twenty-three billion, one hundred twenty-three million, two hundred two thousand, three hundred twelve".