22022221987 has 2 divisors, whose sum is σ = 22022221988. Its totient is φ = 22022221986.

The previous prime is 22022221877. The next prime is 22022222017. The reversal of 22022221987 is 78912222022.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22022221987 - 2¹⁵ = 22022189219 is a prime.

It is a super-2 number, since 2×22022221987² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22022251987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11011110993 + 11011110994.

It is an arithmetic number, because the mean of its divisors is an integer number (11011110994).

Almost surely, 2^22022221987 is an apocalyptic number.

22022221987 is a deficient number, since it is larger than the sum of its proper divisors (1).

22022221987 is an equidigital number, since it uses as much as digits as its factorization.

22022221987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 22022221987 in words is "twenty-two billion, twenty-two million, two hundred twenty-one thousand, nine hundred eighty-seven".