120020111 has 2 divisors, whose sum is σ = 120020112. Its totient is φ = 120020110.

The previous prime is 120020107. The next prime is 120020113. The reversal of 120020111 is 111020021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 120020111 - 2² = 120020107 is a prime.

Together with 120020113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120020113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60010055 + 60010056.

It is an arithmetic number, because the mean of its divisors is an integer number (60010056).

Almost surely, 2^120020111 is an apocalyptic number.

120020111 is a deficient number, since it is larger than the sum of its proper divisors (1).

120020111 is an equidigital number, since it uses as much as digits as its factorization.

120020111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 120020111 is about 10955.3690490097. The cubic root of 120020111 is about 493.2699677664.

Adding to 120020111 its reverse (111020021), we get a palindrome (231040132).

The spelling of 120020111 in words is "one hundred twenty million, twenty thousand, one hundred eleven".