1320001320311 has 4 divisors (see below), whose sum is σ = 1320693509592. Its totient is φ = 1319309131032.

The previous prime is 1320001320263. The next prime is 1320001320353. The reversal of 1320001320311 is 1130231000231.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320001320311 is a prime.

It is a super-2 number, since 2×1320001320311² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1320001320311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320001320611) 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, 346091780 + ... + 346095593.

It is an arithmetic number, because the mean of its divisors is an integer number (330173377398).

Almost surely, 2^{1320001320311} is an apocalyptic number.

1320001320311 is a deficient number, since it is larger than the sum of its proper divisors (692189281).

1320001320311 is an equidigital number, since it uses as much as digits as its factorization.

1320001320311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692189280.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 1320001320311 its reverse (1130231000231), we get a palindrome (2450232320542).

The spelling of 1320001320311 in words is "one trillion, three hundred twenty billion, one million, three hundred twenty thousand, three hundred eleven".