23221199987 has 2 divisors, whose sum is σ = 23221199988. Its totient is φ = 23221199986.

The previous prime is 23221199983. The next prime is 23221200017. The reversal of 23221199987 is 78999112232.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23221199987 - 2² = 23221199983 is a prime.

It is not a weakly prime, because it can be changed into another prime (23221199983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11610599993 + 11610599994.

It is an arithmetic number, because the mean of its divisors is an integer number (11610599994).

Almost surely, 2^23221199987 is an apocalyptic number.

23221199987 is a deficient number, since it is larger than the sum of its proper divisors (1).

23221199987 is an equidigital number, since it uses as much as digits as its factorization.

23221199987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 53.

The spelling of 23221199987 in words is "twenty-three billion, two hundred twenty-one million, one hundred ninety-nine thousand, nine hundred eighty-seven".