1321011220311 has 8 divisors (see below), whose sum is σ = 1957053659760. Its totient is φ = 880674146856.

The previous prime is 1321011220231. The next prime is 1321011220339. The reversal of 1321011220311 is 1130221101231.

1321011220311 is a `hidden beast` number, since 1 + 32 + 101 + 1 + 220 + 311 = 666.

It is not a de Polignac number, because 1321011220311 - 2²⁵ = 1320977665879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321011220391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24463170720 + ... + 24463170773.

It is an arithmetic number, because the mean of its divisors is an integer number (244631707470).

Almost surely, 2^{1321011220311} is an apocalyptic number.

1321011220311 is a deficient number, since it is larger than the sum of its proper divisors (636042439449).

1321011220311 is an equidigital number, since it uses as much as digits as its factorization.

1321011220311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48926341502 (or 48926341496 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1321011220311 its reverse (1130221101231), we get a palindrome (2451232321542).

The spelling of 1321011220311 in words is "one trillion, three hundred twenty-one billion, eleven million, two hundred twenty thousand, three hundred eleven".