1312221110012 has 72 divisors (see below), whose sum is σ = 2460620942640. Its totient is φ = 610507653120.

The previous prime is 1312221110009. The next prime is 1312221110021. The reversal of 1312221110012 is 2100111222131.

It is a happy number.

It is a super-2 number, since 2×1312221110012² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 366438062 + ... + 366441642.

It is an arithmetic number, because the mean of its divisors is an integer number (34175290870).

Almost surely, 2^{1312221110012} is an apocalyptic number.

It is an amenable number.

1312221110012 is a deficient number, since it is larger than the sum of its proper divisors (1148399832628).

1312221110012 is a wasteful number, since it uses less digits than its factorization.

1312221110012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4191 (or 3932 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1312221110012 its reverse (2100111222131), we get a palindrome (3412332332143).

The spelling of 1312221110012 in words is "one trillion, three hundred twelve billion, two hundred twenty-one million, one hundred ten thousand, twelve".