2311222332721 has 2 divisors, whose sum is σ = 2311222332722. Its totient is φ = 2311222332720.

The previous prime is 2311222332647. The next prime is 2311222332737. The reversal of 2311222332721 is 1272332221132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2310737452321 + 484880400 = 1520111^2 + 22020^2 .

It is a cyclic number.

It is not a de Polignac number, because 2311222332721 - 2¹¹ = 2311222330673 is a prime.

It is not a weakly prime, because it can be changed into another prime (2311222336721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1155611166360 + 1155611166361.

It is an arithmetic number, because the mean of its divisors is an integer number (1155611166361).

Almost surely, 2^{2311222332721} is an apocalyptic number.

It is an amenable number.

2311222332721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311222332721 is an equidigital number, since it uses as much as digits as its factorization.

2311222332721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 31.

Adding to 2311222332721 its reverse (1272332221132), we get a palindrome (3583554553853).

The spelling of 2311222332721 in words is "two trillion, three hundred eleven billion, two hundred twenty-two million, three hundred thirty-two thousand, seven hundred twenty-one".