123111212222212 has 24 divisors (see below), whose sum is σ = 218671410727616. Its totient is φ = 60633760400928.

The previous prime is 123111212222177. The next prime is 123111212222231. The reversal of 123111212222212 is 212222212111321.

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, 6515283 + ... + 16990330.

Almost surely, 2^{123111212222212} is an apocalyptic number.

It is an amenable number.

123111212222212 is a deficient number, since it is larger than the sum of its proper divisors (95560198505404).

123111212222212 is a wasteful number, since it uses less digits than its factorization.

123111212222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23525227 (or 23525225 counting only the distinct ones).

The product of its digits is 768, while the sum is 25.

Adding to 123111212222212 its reverse (212222212111321), we get a palindrome (335333424333533).

The spelling of 123111212222212 in words is "one hundred twenty-three trillion, one hundred eleven billion, two hundred twelve million, two hundred twenty-two thousand, two hundred twelve".