1222111097 has 2 divisors, whose sum is σ = 1222111098. Its totient is φ = 1222111096.

The previous prime is 1222111091. The next prime is 1222111117. The reversal of 1222111097 is 7901112221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1142169616 + 79941481 = 33796^2 + 8941^2 .

It is an emirp because it is prime and its reverse (7901112221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222111097 - 2⁴ = 1222111081 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222111091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611055548 + 611055549.

It is an arithmetic number, because the mean of its divisors is an integer number (611055549).

Almost surely, 2^1222111097 is an apocalyptic number.

It is an amenable number.

1222111097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222111097 is an equidigital number, since it uses as much as digits as its factorization.

1222111097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 26.

The square root of 1222111097 is about 34958.7055967466. The cubic root of 1222111097 is about 1069.1457055651.

The spelling of 1222111097 in words is "one billion, two hundred twenty-two million, one hundred eleven thousand, ninety-seven".