23001312121 has 2 divisors, whose sum is σ = 23001312122. Its totient is φ = 23001312120.

The previous prime is 23001312023. The next prime is 23001312149. The reversal of 23001312121 is 12121310032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12544000000 + 10457312121 = 112000^2 + 102261^2 .

It is a cyclic number.

It is not a de Polignac number, because 23001312121 - 2¹⁹ = 23000787833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23001312095 and 23001312104.

It is not a weakly prime, because it can be changed into another prime (23001312181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11500656060 + 11500656061.

It is an arithmetic number, because the mean of its divisors is an integer number (11500656061).

Almost surely, 2^23001312121 is an apocalyptic number.

It is an amenable number.

23001312121 is a deficient number, since it is larger than the sum of its proper divisors (1).

23001312121 is an equidigital number, since it uses as much as digits as its factorization.

23001312121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 23001312121 its reverse (12121310032), we get a palindrome (35122622153).

The spelling of 23001312121 in words is "twenty-three billion, one million, three hundred twelve thousand, one hundred twenty-one".