2211222220997 has 2 divisors, whose sum is σ = 2211222220998. Its totient is φ = 2211222220996.

The previous prime is 2211222220951. The next prime is 2211222221189. The reversal of 2211222220997 is 7990222221122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2071754330881 + 139467890116 = 1439359^2 + 373454^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211222220997 - 2²⁴ = 2211205443781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2211222220937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105611110498 + 1105611110499.

It is an arithmetic number, because the mean of its divisors is an integer number (1105611110499).

Almost surely, 2^{2211222220997} is an apocalyptic number.

It is an amenable number.

2211222220997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211222220997 is an equidigital number, since it uses as much as digits as its factorization.

2211222220997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 2211222220997 in words is "two trillion, two hundred eleven billion, two hundred twenty-two million, two hundred twenty thousand, nine hundred ninety-seven".