129801991211 has 2 divisors, whose sum is σ = 129801991212. Its totient is φ = 129801991210.

The previous prime is 129801991177. The next prime is 129801991219. The reversal of 129801991211 is 112199108921.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129801991211 - 2³⁴ = 112622122027 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (129801991219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64900995605 + 64900995606.

It is an arithmetic number, because the mean of its divisors is an integer number (64900995606).

Almost surely, 2^129801991211 is an apocalyptic number.

129801991211 is a deficient number, since it is larger than the sum of its proper divisors (1).

129801991211 is an equidigital number, since it uses as much as digits as its factorization.

129801991211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 44.

The spelling of 129801991211 in words is "one hundred twenty-nine billion, eight hundred one million, nine hundred ninety-one thousand, two hundred eleven".