121968281 has 8 divisors (see below), whose sum is σ = 124221600. Its totient is φ = 119721280.

The previous prime is 121968269. The next prime is 121968293. The reversal of 121968281 is 182869121.

It is an interprime number because it is at equal distance from previous prime (121968269) and next prime (121968293).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121968281 is a prime.

It is a super-2 number, since 2×121968281² = 29752523140189922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121968881) 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 in 7 ways as a sum of consecutive naturals, for example, 56225 + ... + 58353.

It is an arithmetic number, because the mean of its divisors is an integer number (15527700).

Almost surely, 2^121968281 is an apocalyptic number.

It is an amenable number.

121968281 is a deficient number, since it is larger than the sum of its proper divisors (2253319).

121968281 is an equidigital number, since it uses as much as digits as its factorization.

121968281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159.

The product of its digits is 13824, while the sum is 38.

The square root of 121968281 is about 11043.9250721833. The cubic root of 121968281 is about 495.9245801580.

The spelling of 121968281 in words is "one hundred twenty-one million, nine hundred sixty-eight thousand, two hundred eighty-one".