1321224111311 has 4 divisors (see below), whose sum is σ = 1422856735272. Its totient is φ = 1219591487352.

The previous prime is 1321224111217. The next prime is 1321224111329. The reversal of 1321224111311 is 1131114221231.

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 1321224111311 - 2³⁸ = 1046346204367 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 (1321224111811) 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, 50816311961 + ... + 50816311986.

It is an arithmetic number, because the mean of its divisors is an integer number (355714183818).

Almost surely, 2^{1321224111311} is an apocalyptic number.

1321224111311 is a deficient number, since it is larger than the sum of its proper divisors (101632623961).

1321224111311 is a wasteful number, since it uses less digits than its factorization.

1321224111311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101632623960.

The product of its digits is 288, while the sum is 23.

Adding to 1321224111311 its reverse (1131114221231), we get a palindrome (2452338332542).

The spelling of 1321224111311 in words is "one trillion, three hundred twenty-one billion, two hundred twenty-four million, one hundred eleven thousand, three hundred eleven".