123311120212 has 24 divisors (see below), whose sum is σ = 247791078080. Its totient is φ = 52597157760.

The previous prime is 123311120203. The next prime is 123311120213. The reversal of 123311120212 is 212021113321.

It is a self number, because there is not a number n which added to its sum of digits gives 123311120212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123311120213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10430037 + ... + 10441852.

Almost surely, 2^123311120212 is an apocalyptic number.

It is an amenable number.

123311120212 is an abundant number, since it is smaller than the sum of its proper divisors (124479957868).

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

123311120212 is a wasteful number, since it uses less digits than its factorization.

123311120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20872111 (or 20872109 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 123311120212 its reverse (212021113321), we get a palindrome (335332233533).

The spelling of 123311120212 in words is "one hundred twenty-three billion, three hundred eleven million, one hundred twenty thousand, two hundred twelve".