122857811 has 2 divisors, whose sum is σ = 122857812. Its totient is φ = 122857810.

The previous prime is 122857799. The next prime is 122857829. The reversal of 122857811 is 118758221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122857811 - 2¹⁴ = 122841427 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (122853811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61428905 + 61428906.

It is an arithmetic number, because the mean of its divisors is an integer number (61428906).

Almost surely, 2^122857811 is an apocalyptic number.

122857811 is a deficient number, since it is larger than the sum of its proper divisors (1).

122857811 is an equidigital number, since it uses as much as digits as its factorization.

122857811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 35.

The square root of 122857811 is about 11084.1242775422. The cubic root of 122857811 is about 497.1272745062.

The spelling of 122857811 in words is "one hundred twenty-two million, eight hundred fifty-seven thousand, eight hundred eleven".