22002000991 has 2 divisors, whose sum is σ = 22002000992. Its totient is φ = 22002000990.

The previous prime is 22002000983. The next prime is 22002001019. The reversal of 22002000991 is 19900020022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22002000991 - 2³ = 22002000983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22002007991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11001000495 + 11001000496.

It is an arithmetic number, because the mean of its divisors is an integer number (11001000496).

Almost surely, 2^22002000991 is an apocalyptic number.

22002000991 is a deficient number, since it is larger than the sum of its proper divisors (1).

22002000991 is an equidigital number, since it uses as much as digits as its factorization.

22002000991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 22002000991 in words is "twenty-two billion, two million, nine hundred ninety-one", and thus it is an aban number.