2221311332431 has 4 divisors (see below), whose sum is σ = 2221534208992. Its totient is φ = 2221088455872.

The previous prime is 2221311332417. The next prime is 2221311332437. The reversal of 2221311332431 is 1342331131222.

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 2221311332431 - 2²¹ = 2221309235279 is a prime.

It is a super-2 number, since 2×2221311332431² (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 2221311332431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221311332437) 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, 111423330 + ... + 111443263.

It is an arithmetic number, because the mean of its divisors is an integer number (555383552248).

Almost surely, 2^{2221311332431} is an apocalyptic number.

2221311332431 is a deficient number, since it is larger than the sum of its proper divisors (222876561).

2221311332431 is an equidigital number, since it uses as much as digits as its factorization.

2221311332431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222876560.

The product of its digits is 5184, while the sum is 28.

Adding to 2221311332431 its reverse (1342331131222), we get a palindrome (3563642463653).

The spelling of 2221311332431 in words is "two trillion, two hundred twenty-one billion, three hundred eleven million, three hundred thirty-two thousand, four hundred thirty-one".