122811 has 16 divisors (see below), whose sum is σ = 182784. Its totient is φ = 72864.

The previous prime is 122789. The next prime is 122819. The reversal of 122811 is 118221.

It is not a de Polignac number, because 122811 - 2⁹ = 122299 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 122811.

It is not an unprimeable number, because it can be changed into a prime (122819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1800 + ... + 1866.

It is an arithmetic number, because the mean of its divisors is an integer number (11424).

2¹²²⁸¹¹ is an apocalyptic number.

122811 is a deficient number, since it is larger than the sum of its proper divisors (59973).

122811 is a wasteful number, since it uses less digits than its factorization.

122811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130.

The product of its digits is 32, while the sum is 15.

The square root of 122811 is about 350.4440040862. Note that the first 3 decimals coincide. The cubic root of 122811 is about 49.7064128389.

The spelling of 122811 in words is "one hundred twenty-two thousand, eight hundred eleven".