121056251 has 2 divisors, whose sum is σ = 121056252. Its totient is φ = 121056250.

The previous prime is 121056217. The next prime is 121056253. The reversal of 121056251 is 152650121.

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-121056251 is a prime.

Together with 121056253, 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 (121056253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60528125 + 60528126.

It is an arithmetic number, because the mean of its divisors is an integer number (60528126).

Almost surely, 2^121056251 is an apocalyptic number.

121056251 is a deficient number, since it is larger than the sum of its proper divisors (1).

121056251 is an equidigital number, since it uses as much as digits as its factorization.

121056251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 121056251 is about 11002.5565665440. The cubic root of 121056251 is about 494.6853777304.

The spelling of 121056251 in words is "one hundred twenty-one million, fifty-six thousand, two hundred fifty-one".