1321000013120 has 112 divisors (see below), whose sum is σ = 3365473584000. Its totient is φ = 492382955520.

The previous prime is 1321000013093. The next prime is 1321000013191. The reversal of 1321000013120 is 213100001231.

It is a junction number, because it is equal to n+sod(n) for n = 1321000013095 and 1321000013104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1410020 + ... + 2151779.

Almost surely, 2^{1321000013120} is an apocalyptic number.

1321000013120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321000013120 is an abundant number, since it is smaller than the sum of its proper divisors (2044473570880).

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

1321000013120 is a wasteful number, since it uses less digits than its factorization.

1321000013120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3561896 (or 3561886 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 1321000013120 its reverse (213100001231), we get a palindrome (1534100014351).

The spelling of 1321000013120 in words is "one trillion, three hundred twenty-one billion, thirteen thousand, one hundred twenty".