1231312312212 has 48 divisors (see below), whose sum is σ = 2901701117952. Its totient is φ = 406346684800.

The previous prime is 1231312312141. The next prime is 1231312312267. The reversal of 1231312312212 is 2122132131321.

It is a super-2 number, since 2×1231312312212² (a number of 25 digits) contains 22 as substring.

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

It is a congruent number.

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, 27384493 + ... + 27429419.

It is an arithmetic number, because the mean of its divisors is an integer number (60452106624).

Almost surely, 2^{1231312312212} is an apocalyptic number.

1231312312212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231312312212 is an abundant number, since it is smaller than the sum of its proper divisors (1670388805740).

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

1231312312212 is a wasteful number, since it uses less digits than its factorization.

1231312312212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67648 (or 67646 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

Adding to 1231312312212 its reverse (2122132131321), we get a palindrome (3353444443533).

The spelling of 1231312312212 in words is "one trillion, two hundred thirty-one billion, three hundred twelve million, three hundred twelve thousand, two hundred twelve".