1031221333012 has 12 divisors (see below), whose sum is σ = 1943455589236. Its totient is φ = 475948307520.

The previous prime is 1031221332991. The next prime is 1031221333169. The reversal of 1031221333012 is 2103331221301.

It can be written as a sum of positive squares in 2 ways, for example, as 264241233936 + 766980099076 = 514044^2 + 875774^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9915589689 + ... + 9915589792.

Almost surely, 2^{1031221333012} is an apocalyptic number.

It is an amenable number.

1031221333012 is a deficient number, since it is larger than the sum of its proper divisors (912234256224).

1031221333012 is a wasteful number, since it uses less digits than its factorization.

1031221333012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19831179498 (or 19831179496 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1031221333012 its reverse (2103331221301), we get a palindrome (3134552554313).

The spelling of 1031221333012 in words is "one trillion, thirty-one billion, two hundred twenty-one million, three hundred thirty-three thousand, twelve".