122120111 has 2 divisors, whose sum is σ = 122120112. Its totient is φ = 122120110.

The previous prime is 122120107. The next prime is 122120113. The reversal of 122120111 is 111021221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122120111 - 2² = 122120107 is a prime.

It is a Sophie Germain prime.

Together with 122120113, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 122120092 and 122120101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122120113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61060055 + 61060056.

It is an arithmetic number, because the mean of its divisors is an integer number (61060056).

Almost surely, 2^122120111 is an apocalyptic number.

122120111 is a deficient number, since it is larger than the sum of its proper divisors (1).

122120111 is an equidigital number, since it uses as much as digits as its factorization.

122120111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 122120111 is about 11050.7968490964. The cubic root of 122120111 is about 496.1302757325.

Adding to 122120111 its reverse (111021221), we get a palindrome (233141332).

The spelling of 122120111 in words is "one hundred twenty-two million, one hundred twenty thousand, one hundred eleven".