121256671 has 2 divisors, whose sum is σ = 121256672. Its totient is φ = 121256670.

The previous prime is 121256617. The next prime is 121256719. The reversal of 121256671 is 176652121.

Together with previous prime (121256617) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121256671 - 2⁷ = 121256543 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121256071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60628335 + 60628336.

It is an arithmetic number, because the mean of its divisors is an integer number (60628336).

Almost surely, 2^121256671 is an apocalyptic number.

121256671 is a deficient number, since it is larger than the sum of its proper divisors (1).

121256671 is an equidigital number, since it uses as much as digits as its factorization.

121256671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 31.

The square root of 121256671 is about 11011.6606831122. The cubic root of 121256671 is about 494.9582265874.

The spelling of 121256671 in words is "one hundred twenty-one million, two hundred fifty-six thousand, six hundred seventy-one".