2221231220311 has 2 divisors, whose sum is σ = 2221231220312. Its totient is φ = 2221231220310.

The previous prime is 2221231220297. The next prime is 2221231220321. The reversal of 2221231220311 is 1130221321222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2221231220311 - 2⁹ = 2221231219799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221231220321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110615610155 + 1110615610156.

It is an arithmetic number, because the mean of its divisors is an integer number (1110615610156).

Almost surely, 2^{2221231220311} is an apocalyptic number.

2221231220311 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221231220311 is an equidigital number, since it uses as much as digits as its factorization.

2221231220311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 2221231220311 its reverse (1130221321222), we get a palindrome (3351452541533).

The spelling of 2221231220311 in words is "two trillion, two hundred twenty-one billion, two hundred thirty-one million, two hundred twenty thousand, three hundred eleven".