121368881 has 2 divisors, whose sum is σ = 121368882. Its totient is φ = 121368880.

The previous prime is 121368869. The next prime is 121368883. The reversal of 121368881 is 188863121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117527281 + 3841600 = 10841^2 + 1960^2 .

It is an emirp because it is prime and its reverse (188863121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121368881 is a prime.

It is a super-2 number, since 2×121368881² = 29460810550384322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 121368883, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (121368883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60684440 + 60684441.

It is an arithmetic number, because the mean of its divisors is an integer number (60684441).

Almost surely, 2^121368881 is an apocalyptic number.

It is an amenable number.

121368881 is a deficient number, since it is larger than the sum of its proper divisors (1).

121368881 is an equidigital number, since it uses as much as digits as its factorization.

121368881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 38.

The square root of 121368881 is about 11016.7545583988. The cubic root of 121368881 is about 495.1108563742.

The spelling of 121368881 in words is "one hundred twenty-one million, three hundred sixty-eight thousand, eight hundred eighty-one".