122011811 has 2 divisors, whose sum is σ = 122011812. Its totient is φ = 122011810.

The previous prime is 122011807. The next prime is 122011871. The reversal of 122011811 is 118110221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122011811 - 2² = 122011807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122011811.

It is not a weakly prime, because it can be changed into another prime (122011801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61005905 + 61005906.

It is an arithmetic number, because the mean of its divisors is an integer number (61005906).

Almost surely, 2^122011811 is an apocalyptic number.

122011811 is a deficient number, since it is larger than the sum of its proper divisors (1).

122011811 is an equidigital number, since it uses as much as digits as its factorization.

122011811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

The square root of 122011811 is about 11045.8956630959. The cubic root of 122011811 is about 495.9835709851.

It can be divided in two parts, 1220 and 11811, that added together give a palindrome (13031).

The spelling of 122011811 in words is "one hundred twenty-two million, eleven thousand, eight hundred eleven".