2123322991 has 2 divisors, whose sum is σ = 2123322992. Its totient is φ = 2123322990.

The previous prime is 2123322983. The next prime is 2123323019. The reversal of 2123322991 is 1992233212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2123322991 - 2³ = 2123322983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123322931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061661495 + 1061661496.

It is an arithmetic number, because the mean of its divisors is an integer number (1061661496).

Almost surely, 2^2123322991 is an apocalyptic number.

2123322991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123322991 is an equidigital number, since it uses as much as digits as its factorization.

2123322991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 34.

The square root of 2123322991 is about 46079.5289797975. The cubic root of 2123322991 is about 1285.3025053527.

The spelling of 2123322991 in words is "two billion, one hundred twenty-three million, three hundred twenty-two thousand, nine hundred ninety-one".