222211097 has 4 divisors (see below), whose sum is σ = 235282356. Its totient is φ = 209139840.

The previous prime is 222211081. The next prime is 222211117. The reversal of 222211097 is 790112222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 790112222 = 2 ⋅395056111.

It can be written as a sum of positive squares in 2 ways, for example, as 124121881 + 98089216 = 11141^2 + 9904^2 .

It is a cyclic number.

It is not a de Polignac number, because 222211097 - 2⁴ = 222211081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222211037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6535604 + ... + 6535637.

It is an arithmetic number, because the mean of its divisors is an integer number (58820589).

Almost surely, 2^222211097 is an apocalyptic number.

It is an amenable number.

222211097 is a deficient number, since it is larger than the sum of its proper divisors (13071259).

222211097 is a wasteful number, since it uses less digits than its factorization.

222211097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13071258.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 222211097 is about 14906.7466940309. The cubic root of 222211097 is about 605.6967561735.

The spelling of 222211097 in words is "two hundred twenty-two million, two hundred eleven thousand, ninety-seven".