22220999987 has 2 divisors, whose sum is σ = 22220999988. Its totient is φ = 22220999986.

The previous prime is 22220999869. The next prime is 22221000007. The reversal of 22220999987 is 78999902222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22220999987 - 2³⁴ = 5041130803 is a prime.

It is not a weakly prime, because it can be changed into another prime (22220959987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110499993 + 11110499994.

It is an arithmetic number, because the mean of its divisors is an integer number (11110499994).

Almost surely, 2^22220999987 is an apocalyptic number.

22220999987 is a deficient number, since it is larger than the sum of its proper divisors (1).

22220999987 is an equidigital number, since it uses as much as digits as its factorization.

22220999987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5878656, while the sum is 59.

The spelling of 22220999987 in words is "twenty-two billion, two hundred twenty million, nine hundred ninety-nine thousand, nine hundred eighty-seven".