121143613 has 2 divisors, whose sum is σ = 121143614. Its totient is φ = 121143612.

The previous prime is 121143611. The next prime is 121143619. The reversal of 121143613 is 316341121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102151449 + 18992164 = 10107^2 + 4358^2 .

It is a cyclic number.

It is not a de Polignac number, because 121143613 - 2¹ = 121143611 is a prime.

It is a super-3 number, since 3×121143613³ (a number of 25 digits) contains 333 as substring.

Together with 121143611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121143611) 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, 60571806 + 60571807.

It is an arithmetic number, because the mean of its divisors is an integer number (60571807).

Almost surely, 2^121143613 is an apocalyptic number.

It is an amenable number.

121143613 is a deficient number, since it is larger than the sum of its proper divisors (1).

121143613 is an equidigital number, since it uses as much as digits as its factorization.

121143613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 22.

The square root of 121143613 is about 11006.5259278303. The cubic root of 121143613 is about 494.8043480763.

Adding to 121143613 its reverse (316341121), we get a palindrome (437484734).

The spelling of 121143613 in words is "one hundred twenty-one million, one hundred forty-three thousand, six hundred thirteen".