1320979111871 has 4 divisors (see below), whose sum is σ = 1320984163872. Its totient is φ = 1320974059872.

The previous prime is 1320979111861. The next prime is 1320979111877. The reversal of 1320979111871 is 1781119790231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1320979111871 - 2¹⁸ = 1320978849727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320979111877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2111066 + ... + 2664311.

It is an arithmetic number, because the mean of its divisors is an integer number (330246040968).

Almost surely, 2^{1320979111871} is an apocalyptic number.

1320979111871 is a deficient number, since it is larger than the sum of its proper divisors (5052001).

1320979111871 is an equidigital number, since it uses as much as digits as its factorization.

1320979111871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5052000.

The product of its (nonzero) digits is 190512, while the sum is 50.

The spelling of 1320979111871 in words is "one trillion, three hundred twenty billion, nine hundred seventy-nine million, one hundred eleven thousand, eight hundred seventy-one".