1122345221 has 2 divisors, whose sum is σ = 1122345222. Its totient is φ = 1122345220.

The previous prime is 1122345167. The next prime is 1122345233. The reversal of 1122345221 is 1225432211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1039353121 + 82992100 = 32239^2 + 9110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1122345221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1122345271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561172610 + 561172611.

It is an arithmetic number, because the mean of its divisors is an integer number (561172611).

Almost surely, 2^1122345221 is an apocalyptic number.

It is an amenable number.

1122345221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122345221 is an equidigital number, since it uses as much as digits as its factorization.

1122345221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 23.

The square root of 1122345221 is about 33501.4211788097. The cubic root of 1122345221 is about 1039.2231689637.

Adding to 1122345221 its reverse (1225432211), we get a palindrome (2347777432).

The spelling of 1122345221 in words is "one billion, one hundred twenty-two million, three hundred forty-five thousand, two hundred twenty-one".