1321020013012 has 12 divisors (see below), whose sum is σ = 2642040026080. Its totient is φ = 566151434136.

The previous prime is 1321020012943. The next prime is 1321020013111. The reversal of 1321020013012 is 2103100201231.

1321020013012 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23589643062 + ... + 23589643117.

Almost surely, 2^{1321020013012} is an apocalyptic number.

It is an amenable number.

1321020013012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1321020013012 is a wasteful number, since it uses less digits than its factorization.

1321020013012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47179286190 (or 47179286188 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1321020013012 its reverse (2103100201231), we get a palindrome (3424120214243).

The spelling of 1321020013012 in words is "one trillion, three hundred twenty-one billion, twenty million, thirteen thousand, twelve".