1121256167 has 2 divisors, whose sum is σ = 1121256168. Its totient is φ = 1121256166.

The previous prime is 1121256161. The next prime is 1121256193. The reversal of 1121256167 is 7616521211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1121256167 - 2¹² = 1121252071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121256161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560628083 + 560628084.

It is an arithmetic number, because the mean of its divisors is an integer number (560628084).

Almost surely, 2^1121256167 is an apocalyptic number.

1121256167 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121256167 is an equidigital number, since it uses as much as digits as its factorization.

1121256167 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 32.

The square root of 1121256167 is about 33485.1633861924. The cubic root of 1121256167 is about 1038.8869276743.

Adding to 1121256167 its reverse (7616521211), we get a palindrome (8737777378).

The spelling of 1121256167 in words is "one billion, one hundred twenty-one million, two hundred fifty-six thousand, one hundred sixty-seven".