121143611 has 2 divisors, whose sum is σ = 121143612. Its totient is φ = 121143610.

The previous prime is 121143569. The next prime is 121143613. The reversal of 121143611 is 116341121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121143611 is a prime.

It is a super-3 number, since 3×121143611³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

Together with 121143613, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121143613) 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, 60571805 + 60571806.

It is an arithmetic number, because the mean of its divisors is an integer number (60571806).

Almost surely, 2^121143611 is an apocalyptic number.

121143611 is a deficient number, since it is larger than the sum of its proper divisors (1).

121143611 is an equidigital number, since it uses as much as digits as its factorization.

121143611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 20.

The square root of 121143611 is about 11006.5258369751. The cubic root of 121143611 is about 494.8043453533.

Adding to 121143611 its reverse (116341121), we get a palindrome (237484732).

The spelling of 121143611 in words is "one hundred twenty-one million, one hundred forty-three thousand, six hundred eleven".