121423111 has 2 divisors, whose sum is σ = 121423112. Its totient is φ = 121423110.

The previous prime is 121423097. The next prime is 121423151. The reversal of 121423111 is 111324121.

It is a weak prime.

It is an emirp because it is prime and its reverse (111324121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121423111 - 2⁹ = 121422599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121423151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60711555 + 60711556.

It is an arithmetic number, because the mean of its divisors is an integer number (60711556).

Almost surely, 2^121423111 is an apocalyptic number.

121423111 is a deficient number, since it is larger than the sum of its proper divisors (1).

121423111 is an equidigital number, since it uses as much as digits as its factorization.

121423111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48, while the sum is 16.

The square root of 121423111 is about 11019.2155346921. The cubic root of 121423111 is about 495.1845871458.

Adding to 121423111 its reverse (111324121), we get a palindrome (232747232).

The spelling of 121423111 in words is "one hundred twenty-one million, four hundred twenty-three thousand, one hundred eleven".