1220322311311 has 4 divisors (see below), whose sum is σ = 1284549801400. Its totient is φ = 1156094821224.

The previous prime is 1220322311309. The next prime is 1220322311317. The reversal of 1220322311311 is 1131132230221.

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 1220322311311 - 2¹ = 1220322311309 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 (1220322311317) 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, 32113745016 + ... + 32113745053.

It is an arithmetic number, because the mean of its divisors is an integer number (321137450350).

Almost surely, 2^{1220322311311} is an apocalyptic number.

1220322311311 is a deficient number, since it is larger than the sum of its proper divisors (64227490089).

1220322311311 is an equidigital number, since it uses as much as digits as its factorization.

1220322311311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64227490088.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1220322311311 its reverse (1131132230221), we get a palindrome (2351454541532).

The spelling of 1220322311311 in words is "one trillion, two hundred twenty billion, three hundred twenty-two million, three hundred eleven thousand, three hundred eleven".