1211212159 has 2 divisors, whose sum is σ = 1211212160. Its totient is φ = 1211212158.

The previous prime is 1211212151. The next prime is 1211212181. The reversal of 1211212159 is 9512121121.

It is a weak prime.

It is an emirp because it is prime and its reverse (9512121121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1211212159 - 2³ = 1211212151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211212151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605606079 + 605606080.

It is an arithmetic number, because the mean of its divisors is an integer number (605606080).

Almost surely, 2^1211212159 is an apocalyptic number.

1211212159 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211212159 is an equidigital number, since it uses as much as digits as its factorization.

1211212159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 25.

The square root of 1211212159 is about 34802.4734609481. The cubic root of 1211212159 is about 1065.9579525389.

The spelling of 1211212159 in words is "one billion, two hundred eleven million, two hundred twelve thousand, one hundred fifty-nine".