1211331167 has 2 divisors, whose sum is σ = 1211331168. Its totient is φ = 1211331166.

The previous prime is 1211331161. The next prime is 1211331203. The reversal of 1211331167 is 7611331121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211331167 - 2⁴ = 1211331151 is a prime.

It is a super-2 number, since 2×1211331167² = 2934646392291163778, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211331161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605665583 + 605665584.

It is an arithmetic number, because the mean of its divisors is an integer number (605665584).

Almost surely, 2^1211331167 is an apocalyptic number.

1211331167 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211331167 is an equidigital number, since it uses as much as digits as its factorization.

1211331167 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 26.

The square root of 1211331167 is about 34804.1831824854. The cubic root of 1211331167 is about 1065.9928633976.

Adding to 1211331167 its reverse (7611331121), we get a palindrome (8822662288).

The spelling of 1211331167 in words is "one billion, two hundred eleven million, three hundred thirty-one thousand, one hundred sixty-seven".