1321112221012 has 24 divisors (see below), whose sum is σ = 2391713541000. Its totient is φ = 637766349696.

The previous prime is 1321112220947. The next prime is 1321112221031. The reversal of 1321112221012 is 2101222111231.

It can be written as a sum of positive squares in 4 ways, for example, as 17391279376 + 1303720941636 = 131876^2 + 1141806^2 .

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, 11793538 + ... + 11905030.

It is an arithmetic number, because the mean of its divisors is an integer number (99654730875).

Almost surely, 2^{1321112221012} is an apocalyptic number.

It is an amenable number.

1321112221012 is a deficient number, since it is larger than the sum of its proper divisors (1070601319988).

1321112221012 is a wasteful number, since it uses less digits than its factorization.

1321112221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213675 (or 213673 counting only the distinct ones).

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

Adding to 1321112221012 its reverse (2101222111231), we get a palindrome (3422334332243).

The spelling of 1321112221012 in words is "one trillion, three hundred twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, twelve".