13242121 has 2 divisors, whose sum is σ = 13242122. Its totient is φ = 13242120.

The previous prime is 13242101. The next prime is 13242157. The reversal of 13242121 is 12124231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12924025 + 318096 = 3595^2 + 564^2 .

It is a cyclic number.

It is not a de Polignac number, because 13242121 - 2⁹ = 13241609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13242095 and 13242104.

It is not a weakly prime, because it can be changed into another prime (13242101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6621060 + 6621061.

It is an arithmetic number, because the mean of its divisors is an integer number (6621061).

Almost surely, 2^13242121 is an apocalyptic number.

It is an amenable number.

13242121 is a deficient number, since it is larger than the sum of its proper divisors (1).

13242121 is an equidigital number, since it uses as much as digits as its factorization.

13242121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 16.

The square root of 13242121 is about 3638.9725198193. The cubic root of 13242121 is about 236.5842616852.

Adding to 13242121 its reverse (12124231), we get a palindrome (25366352).

The spelling of 13242121 in words is "thirteen million, two hundred forty-two thousand, one hundred twenty-one".