121968881 has 2 divisors, whose sum is σ = 121968882. Its totient is φ = 121968880.

The previous prime is 121968853. The next prime is 121968907. The reversal of 121968881 is 188869121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73805281 + 48163600 = 8591^2 + 6940^2 .

It is a cyclic number.

It is not a de Polignac number, because 121968881 - 2¹⁴ = 121952497 is a prime.

It is a super-2 number, since 2×121968881² = 29752815864784322, which contains 22 as substring.

It is a Chen prime.

It is a zygodrome in base 3.

It is not a weakly prime, because it can be changed into another prime (121998881) 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, 60984440 + 60984441.

It is an arithmetic number, because the mean of its divisors is an integer number (60984441).

Almost surely, 2^121968881 is an apocalyptic number.

It is an amenable number.

121968881 is a deficient number, since it is larger than the sum of its proper divisors (1).

121968881 is an equidigital number, since it uses as much as digits as its factorization.

121968881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 44.

The square root of 121968881 is about 11043.9522364052. The cubic root of 121968881 is about 495.9253933592.

The spelling of 121968881 in words is "one hundred twenty-one million, nine hundred sixty-eight thousand, eight hundred eighty-one".