123212113212 has 48 divisors (see below), whose sum is σ = 290026275840. Its totient is φ = 40710553728.

The previous prime is 123212113147. The next prime is 123212113217. The reversal of 123212113212 is 212311212321.

123212113212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123212113217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 580693 + ... + 763955.

It is an arithmetic number, because the mean of its divisors is an integer number (6042214080).

Almost surely, 2^123212113212 is an apocalyptic number.

123212113212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123212113212 is an abundant number, since it is smaller than the sum of its proper divisors (166814162628).

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

123212113212 is a wasteful number, since it uses less digits than its factorization.

123212113212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183762 (or 183760 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

Adding to 123212113212 its reverse (212311212321), we get a palindrome (335523325533).

The spelling of 123212113212 in words is "one hundred twenty-three billion, two hundred twelve million, one hundred thirteen thousand, two hundred twelve".