221122091 has 2 divisors, whose sum is σ = 221122092. Its totient is φ = 221122090.

The previous prime is 221122067. The next prime is 221122103. The reversal of 221122091 is 190221122.

It is a happy number.

221122091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221122091 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221122591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110561045 + 110561046.

It is an arithmetic number, because the mean of its divisors is an integer number (110561046).

Almost surely, 2^221122091 is an apocalyptic number.

221122091 is a deficient number, since it is larger than the sum of its proper divisors (1).

221122091 is an equidigital number, since it uses as much as digits as its factorization.

221122091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 221122091 is about 14870.1745450415. The cubic root of 221122091 is about 604.7056747461.

The spelling of 221122091 in words is "two hundred twenty-one million, one hundred twenty-two thousand, ninety-one".