1223021099 has 2 divisors, whose sum is σ = 1223021100. Its totient is φ = 1223021098.

The previous prime is 1223021087. The next prime is 1223021131. The reversal of 1223021099 is 9901203221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1223021099 - 2²⁰ = 1221972523 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1223021029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611510549 + 611510550.

It is an arithmetic number, because the mean of its divisors is an integer number (611510550).

Almost surely, 2^1223021099 is an apocalyptic number.

1223021099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223021099 is an equidigital number, since it uses as much as digits as its factorization.

1223021099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 1223021099 is about 34971.7185594303. The cubic root of 1223021099 is about 1069.4110069625.

The spelling of 1223021099 in words is "one billion, two hundred twenty-three million, twenty-one thousand, ninety-nine".