1211162179 has 2 divisors, whose sum is σ = 1211162180. Its totient is φ = 1211162178.

The previous prime is 1211162081. The next prime is 1211162191. The reversal of 1211162179 is 9712611121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211162179 - 2⁹ = 1211161667 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1211162179.

It is not a weakly prime, because it can be changed into another prime (1211162479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605581089 + 605581090.

It is an arithmetic number, because the mean of its divisors is an integer number (605581090).

Almost surely, 2^1211162179 is an apocalyptic number.

1211162179 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211162179 is an equidigital number, since it uses as much as digits as its factorization.

1211162179 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 31.

The square root of 1211162179 is about 34801.7554011288. The cubic root of 1211162179 is about 1065.9432902821.

The spelling of 1211162179 in words is "one billion, two hundred eleven million, one hundred sixty-two thousand, one hundred seventy-nine".