122808511 has 4 divisors (see below), whose sum is σ = 140352592. Its totient is φ = 105264432.

The previous prime is 122808503. The next prime is 122808551. The reversal of 122808511 is 115808221.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 122808511 - 2³ = 122808503 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122808511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122808551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8772030 + ... + 8772043.

It is an arithmetic number, because the mean of its divisors is an integer number (35088148).

Almost surely, 2^122808511 is an apocalyptic number.

122808511 is a deficient number, since it is larger than the sum of its proper divisors (17544081).

122808511 is an equidigital number, since it uses as much as digits as its factorization.

122808511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17544080.

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 122808511 is about 11081.9001529521. The cubic root of 122808511 is about 497.0607703814.

The spelling of 122808511 in words is "one hundred twenty-two million, eight hundred eight thousand, five hundred eleven".