1121222279 has 2 divisors, whose sum is σ = 1121222280. Its totient is φ = 1121222278.

The previous prime is 1121222269. The next prime is 1121222327. The reversal of 1121222279 is 9722221211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1121222279 - 2²⁴ = 1104445063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121222209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560611139 + 560611140.

It is an arithmetic number, because the mean of its divisors is an integer number (560611140).

Almost surely, 2^1121222279 is an apocalyptic number.

1121222279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121222279 is an equidigital number, since it uses as much as digits as its factorization.

1121222279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 29.

The square root of 1121222279 is about 33484.6573672182. The cubic root of 1121222279 is about 1038.8764613907.

The spelling of 1121222279 in words is "one billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred seventy-nine".