1312221103312 has 40 divisors (see below), whose sum is σ = 2905843942656. Its totient is φ = 562339537536.

The previous prime is 1312221103309. The next prime is 1312221103367. The reversal of 1312221103312 is 2133011222131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1144878 + ... + 1983730.

Almost surely, 2^{1312221103312} is an apocalyptic number.

It is an amenable number.

1312221103312 is an abundant number, since it is smaller than the sum of its proper divisors (1593622839344).

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

1312221103312 is a wasteful number, since it uses less digits than its factorization.

1312221103312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852835 (or 852829 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1312221103312 its reverse (2133011222131), we get a palindrome (3445232325443).

The spelling of 1312221103312 in words is "one trillion, three hundred twelve billion, two hundred twenty-one million, one hundred three thousand, three hundred twelve".