22101199987 has 2 divisors, whose sum is σ = 22101199988. Its totient is φ = 22101199986.

The previous prime is 22101199963. The next prime is 22101200039. The reversal of 22101199987 is 78999110122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22101199987 - 2²³ = 22092811379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22101199987.

It is not a weakly prime, because it can be changed into another prime (22101199957) 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, 11050599993 + 11050599994.

It is an arithmetic number, because the mean of its divisors is an integer number (11050599994).

Almost surely, 2^22101199987 is an apocalyptic number.

22101199987 is a deficient number, since it is larger than the sum of its proper divisors (1).

22101199987 is an equidigital number, since it uses as much as digits as its factorization.

22101199987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 49.

The spelling of 22101199987 in words is "twenty-two billion, one hundred one million, one hundred ninety-nine thousand, nine hundred eighty-seven".