22220210220991 has 2 divisors, whose sum is σ = 22220210220992. Its totient is φ = 22220210220990.

The previous prime is 22220210220941. The next prime is 22220210221043. The reversal of 22220210220991 is 19902201202222.

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-22220210220991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22220210220931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110105110495 + 11110105110496.

It is an arithmetic number, because the mean of its divisors is an integer number (11110105110496).

Almost surely, 2^{22220210220991} is an apocalyptic number.

22220210220991 is a deficient number, since it is larger than the sum of its proper divisors (1).

22220210220991 is an equidigital number, since it uses as much as digits as its factorization.

22220210220991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 22220210220991 in words is "twenty-two trillion, two hundred twenty billion, two hundred ten million, two hundred twenty thousand, nine hundred ninety-one".