1113412121 has 2 divisors, whose sum is σ = 1113412122. Its totient is φ = 1113412120.

The previous prime is 1113412067. The next prime is 1113412123. The reversal of 1113412121 is 1212143111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 836655625 + 276756496 = 28925^2 + 16636^2 .

It is a cyclic number.

It is not a de Polignac number, because 1113412121 - 2⁶ = 1113412057 is a prime.

Together with 1113412123, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1113412121.

It is not a weakly prime, because it can be changed into another prime (1113412123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556706060 + 556706061.

It is an arithmetic number, because the mean of its divisors is an integer number (556706061).

Almost surely, 2^1113412121 is an apocalyptic number.

It is an amenable number.

1113412121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113412121 is an equidigital number, since it uses as much as digits as its factorization.

1113412121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48, while the sum is 17.

The square root of 1113412121 is about 33367.8306307138. The cubic root of 1113412121 is about 1036.4586529397.

Adding to 1113412121 its reverse (1212143111), we get a palindrome (2325555232).

The spelling of 1113412121 in words is "one billion, one hundred thirteen million, four hundred twelve thousand, one hundred twenty-one".