120806173091 has 2 divisors, whose sum is σ = 120806173092. Its totient is φ = 120806173090.

The previous prime is 120806173069. The next prime is 120806173097. The reversal of 120806173091 is 190371608021.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120806173091 is a prime.

It is not a weakly prime, because it can be changed into another prime (120806173097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60403086545 + 60403086546.

It is an arithmetic number, because the mean of its divisors is an integer number (60403086546).

Almost surely, 2^120806173091 is an apocalyptic number.

120806173091 is a deficient number, since it is larger than the sum of its proper divisors (1).

120806173091 is an equidigital number, since it uses as much as digits as its factorization.

120806173091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The spelling of 120806173091 in words is "one hundred twenty billion, eight hundred six million, one hundred seventy-three thousand, ninety-one".