23112121 has 2 divisors, whose sum is σ = 23112122. Its totient is φ = 23112120.

The previous prime is 23112083. The next prime is 23112137. The reversal of 23112121 is 12121132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22090000 + 1022121 = 4700^2 + 1011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23112121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23112191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11556060 + 11556061.

It is an arithmetic number, because the mean of its divisors is an integer number (11556061).

Almost surely, 2^23112121 is an apocalyptic number.

It is an amenable number.

23112121 is a deficient number, since it is larger than the sum of its proper divisors (1).

23112121 is an equidigital number, since it uses as much as digits as its factorization.

23112121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24, while the sum is 13.

The square root of 23112121 is about 4807.5067342647. The cubic root of 23112121 is about 284.8480610052.

Adding to 23112121 its reverse (12121132), we get a palindrome (35233253).

The spelling of 23112121 in words is "twenty-three million, one hundred twelve thousand, one hundred twenty-one".