1320311515311 has 8 divisors (see below), whose sum is σ = 1956017059760. Its totient is φ = 880207676856.

The previous prime is 1320311515283. The next prime is 1320311515319. The reversal of 1320311515311 is 1135151130231.

1320311515311 is a `hidden beast` number, since 1 + 3 + 20 + 311 + 5 + 15 + 311 = 666.

It is not a de Polignac number, because 1320311515311 - 2⁵ = 1320311515279 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 48900426493 = 1320311515311 / (1 + 3 + 2 + 0 + 3 + 1 + 1 + 5 + 1 + 5 + 3 + 1 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320311515319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24450213220 + ... + 24450213273.

It is an arithmetic number, because the mean of its divisors is an integer number (244502132470).

Almost surely, 2^{1320311515311} is an apocalyptic number.

1320311515311 is a deficient number, since it is larger than the sum of its proper divisors (635705544449).

1320311515311 is an equidigital number, since it uses as much as digits as its factorization.

1320311515311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48900426502 (or 48900426496 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 27.

Adding to 1320311515311 its reverse (1135151130231), we get a palindrome (2455462645542).

The spelling of 1320311515311 in words is "one trillion, three hundred twenty billion, three hundred eleven million, five hundred fifteen thousand, three hundred eleven".