2123221699 has 2 divisors, whose sum is σ = 2123221700. Its totient is φ = 2123221698.

The previous prime is 2123221679. The next prime is 2123221703. The reversal of 2123221699 is 9961223212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2123221699 - 2²⁷ = 1989003971 is a prime.

It is not a weakly prime, because it can be changed into another prime (2123221619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061610849 + 1061610850.

It is an arithmetic number, because the mean of its divisors is an integer number (1061610850).

Almost surely, 2^2123221699 is an apocalyptic number.

2123221699 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123221699 is an equidigital number, since it uses as much as digits as its factorization.

2123221699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 37.

The square root of 2123221699 is about 46078.4298669128. The cubic root of 2123221699 is about 1285.2820668024.

The spelling of 2123221699 in words is "two billion, one hundred twenty-three million, two hundred twenty-one thousand, six hundred ninety-nine".