1222221999923 has 2 divisors, whose sum is σ = 1222221999924. Its totient is φ = 1222221999922.

The previous prime is 1222221999917. The next prime is 1222222000079. The reversal of 1222221999923 is 3299991222221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1222221999923 - 2³⁴ = 1205042130739 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1222221999913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611110999961 + 611110999962.

It is an arithmetic number, because the mean of its divisors is an integer number (611110999962).

Almost surely, 2^{1222221999923} is an apocalyptic number.

1222221999923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222221999923 is an equidigital number, since it uses as much as digits as its factorization.

1222221999923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1259712, while the sum is 53.

The spelling of 1222221999923 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, nine hundred ninety-nine thousand, nine hundred twenty-three".