1331022231311 has 4 divisors (see below), whose sum is σ = 1331586943992. Its totient is φ = 1330457518632.

The previous prime is 1331022231271. The next prime is 1331022231347. The reversal of 1331022231311 is 1131322201331.

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 1331022231311 - 2²² = 1331018037007 is a prime.

It is a super-2 number, since 2×1331022231311² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331022236311) 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, 282352805 + ... + 282357518.

It is an arithmetic number, because the mean of its divisors is an integer number (332896735998).

Almost surely, 2^{1331022231311} is an apocalyptic number.

1331022231311 is a deficient number, since it is larger than the sum of its proper divisors (564712681).

1331022231311 is an equidigital number, since it uses as much as digits as its factorization.

1331022231311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564712680.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1331022231311 its reverse (1131322201331), we get a palindrome (2462344432642).

The spelling of 1331022231311 in words is "one trillion, three hundred thirty-one billion, twenty-two million, two hundred thirty-one thousand, three hundred eleven".