20222122198987 has 2 divisors, whose sum is σ = 20222122198988. Its totient is φ = 20222122198986.

The previous prime is 20222122198909. The next prime is 20222122199033. The reversal of 20222122198987 is 78989122122202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20222122198987 is a prime.

It is not a weakly prime, because it can be changed into another prime (20222122195987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10111061099493 + 10111061099494.

It is an arithmetic number, because the mean of its divisors is an integer number (10111061099494).

Almost surely, 2^{20222122198987} is an apocalyptic number.

20222122198987 is a deficient number, since it is larger than the sum of its proper divisors (1).

20222122198987 is an equidigital number, since it uses as much as digits as its factorization.

20222122198987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2322432, while the sum is 55.

The spelling of 20222122198987 in words is "twenty trillion, two hundred twenty-two billion, one hundred twenty-two million, one hundred ninety-eight thousand, nine hundred eighty-seven".