2211000997 has 2 divisors, whose sum is σ = 2211000998. Its totient is φ = 2211000996.

The previous prime is 2211000991. The next prime is 2211001007. The reversal of 2211000997 is 7990001122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1783710756 + 427290241 = 42234^2 + 20671^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2211000997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2211000991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105500498 + 1105500499.

It is an arithmetic number, because the mean of its divisors is an integer number (1105500499).

Almost surely, 2^2211000997 is an apocalyptic number.

It is an amenable number.

2211000997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211000997 is an equidigital number, since it uses as much as digits as its factorization.

2211000997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 2211000997 is about 47021.2823836186. The cubic root of 2211000997 is about 1302.7556923268.

The spelling of 2211000997 in words is "two billion, two hundred eleven million, nine hundred ninety-seven", and thus it is an aban number.