23221319999 has 2 divisors, whose sum is σ = 23221320000. Its totient is φ = 23221319998.

The previous prime is 23221319993. The next prime is 23221320049. The reversal of 23221319999 is 99991312232.

It is a happy number.

It is an a-pointer prime, because the next prime (23221320049) can be obtained adding 23221319999 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23221319999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23221319993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11610659999 + 11610660000.

It is an arithmetic number, because the mean of its divisors is an integer number (11610660000).

Almost surely, 2^23221319999 is an apocalyptic number.

23221319999 is a deficient number, since it is larger than the sum of its proper divisors (1).

23221319999 is an equidigital number, since it uses as much as digits as its factorization.

23221319999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 472392, while the sum is 50.

The spelling of 23221319999 in words is "twenty-three billion, two hundred twenty-one million, three hundred nineteen thousand, nine hundred ninety-nine".