1229801291 has 2 divisors, whose sum is σ = 1229801292. Its totient is φ = 1229801290.

The previous prime is 1229801207. The next prime is 1229801303. The reversal of 1229801291 is 1921089221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1229801291 is a prime.

It is a super-2 number, since 2×1229801291² = 3024822430690533362, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1229801491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614900645 + 614900646.

It is an arithmetic number, because the mean of its divisors is an integer number (614900646).

Almost surely, 2^1229801291 is an apocalyptic number.

1229801291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1229801291 is an equidigital number, since it uses as much as digits as its factorization.

1229801291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 1229801291 is about 35068.5227946659. The cubic root of 1229801291 is about 1071.3835687451.

The spelling of 1229801291 in words is "one billion, two hundred twenty-nine million, eight hundred one thousand, two hundred ninety-one".