99770771171 has 2 divisors, whose sum is σ = 99770771172. Its totient is φ = 99770771170.

The previous prime is 99770771119. The next prime is 99770771179. The reversal of 99770771171 is 17117707799.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99770771171 - 2¹⁰ = 99770770147 is a prime.

It is a super-2 number, since 2×99770771171² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99770771179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49885385585 + 49885385586.

It is an arithmetic number, because the mean of its divisors is an integer number (49885385586).

Almost surely, 2^99770771171 is an apocalyptic number.

99770771171 is a deficient number, since it is larger than the sum of its proper divisors (1).

99770771171 is an equidigital number, since it uses as much as digits as its factorization.

99770771171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1361367, while the sum is 56.

The spelling of 99770771171 in words is "ninety-nine billion, seven hundred seventy million, seven hundred seventy-one thousand, one hundred seventy-one".