121623113 has 2 divisors, whose sum is σ = 121623114. Its totient is φ = 121623112.

The previous prime is 121623091. The next prime is 121623119. The reversal of 121623113 is 311326121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98168464 + 23454649 = 9908^2 + 4843^2 .

It is an emirp because it is prime and its reverse (311326121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121623113 - 2¹⁰ = 121622089 is a prime.

It is not a weakly prime, because it can be changed into another prime (121623119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60811556 + 60811557.

It is an arithmetic number, because the mean of its divisors is an integer number (60811557).

Almost surely, 2^121623113 is an apocalyptic number.

It is an amenable number.

121623113 is a deficient number, since it is larger than the sum of its proper divisors (1).

121623113 is an equidigital number, since it uses as much as digits as its factorization.

121623113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 20.

The square root of 121623113 is about 11028.2869476633. The cubic root of 121623113 is about 495.4563189985.

Adding to 121623113 its reverse (311326121), we get a palindrome (432949234).

The spelling of 121623113 in words is "one hundred twenty-one million, six hundred twenty-three thousand, one hundred thirteen".