1320121012309 has 16 divisors (see below), whose sum is σ = 1449826297920. Its totient is φ = 1192057056000.

The previous prime is 1320121012303. The next prime is 1320121012361. The reversal of 1320121012309 is 9032101210231.

It is a cyclic number.

It is not a de Polignac number, because 1320121012309 - 2³⁵ = 1285761273941 is a prime.

It is a super-2 number, since 2×1320121012309² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320121012303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 391174 + ... + 1671304.

It is an arithmetic number, because the mean of its divisors is an integer number (90614143620).

Almost surely, 2^{1320121012309} is an apocalyptic number.

It is an amenable number.

1320121012309 is a deficient number, since it is larger than the sum of its proper divisors (129705285611).

1320121012309 is a wasteful number, since it uses less digits than its factorization.

1320121012309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280772.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 1320121012309 in words is "one trillion, three hundred twenty billion, one hundred twenty-one million, twelve thousand, three hundred nine".