123111301231212 has 48 divisors (see below), whose sum is σ = 332920701937152. Its totient is φ = 34679239781760.

The previous prime is 123111301231153. The next prime is 123111301231223. The reversal of 123111301231212 is 212132103111321.

123111301231212 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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, 10321196353 + ... + 10321208280.

It is an arithmetic number, because the mean of its divisors is an integer number (6935847957024).

Almost surely, 2^{123111301231212} is an apocalyptic number.

123111301231212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123111301231212 is an abundant number, since it is smaller than the sum of its proper divisors (209809400705940).

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

123111301231212 is a wasteful number, since it uses less digits than its factorization.

123111301231212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20642404718 (or 20642404716 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

Adding to 123111301231212 its reverse (212132103111321), we get a palindrome (335243404342533).

The spelling of 123111301231212 in words is "one hundred twenty-three trillion, one hundred eleven billion, three hundred one million, two hundred thirty-one thousand, two hundred twelve".