1312221112012 has 12 divisors (see below), whose sum is σ = 2298165721096. Its totient is φ = 655602334560.

The previous prime is 1312221111947. The next prime is 1312221112073. The reversal of 1312221112012 is 2102111222131.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127049553 + ... + 127059880.

Almost surely, 2^{1312221112012} is an apocalyptic number.

It is an amenable number.

1312221112012 is a deficient number, since it is larger than the sum of its proper divisors (985944609084).

1312221112012 is a wasteful number, since it uses less digits than its factorization.

1312221112012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254110728 (or 254110726 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1312221112012 its reverse (2102111222131), we get a palindrome (3414332334143).

The spelling of 1312221112012 in words is "one trillion, three hundred twelve billion, two hundred twenty-one million, one hundred twelve thousand, twelve".