22020199991 has 2 divisors, whose sum is σ = 22020199992. Its totient is φ = 22020199990.

The previous prime is 22020199979. The next prime is 22020200029. The reversal of 22020199991 is 19999102022.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22020199991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22020399991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010099995 + 11010099996.

It is an arithmetic number, because the mean of its divisors is an integer number (11010099996).

Almost surely, 2^22020199991 is an apocalyptic number.

22020199991 is a deficient number, since it is larger than the sum of its proper divisors (1).

22020199991 is an equidigital number, since it uses as much as digits as its factorization.

22020199991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 44.

The spelling of 22020199991 in words is "twenty-two billion, twenty million, one hundred ninety-nine thousand, nine hundred ninety-one".