1231021132212 has 12 divisors (see below), whose sum is σ = 2872382641856. Its totient is φ = 410340377400.

The previous prime is 1231021132199. The next prime is 1231021132217. The reversal of 1231021132212 is 2122311201321.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231021132217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51292547164 + ... + 51292547187.

Almost surely, 2^{1231021132212} is an apocalyptic number.

1231021132212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231021132212 is an abundant number, since it is smaller than the sum of its proper divisors (1641361509644).

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

1231021132212 is a wasteful number, since it uses less digits than its factorization.

1231021132212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102585094358 (or 102585094356 counting only the distinct ones).

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

Adding to 1231021132212 its reverse (2122311201321), we get a palindrome (3353332333533).

The spelling of 1231021132212 in words is "one trillion, two hundred thirty-one billion, twenty-one million, one hundred thirty-two thousand, two hundred twelve".