121256167 has 2 divisors, whose sum is σ = 121256168. Its totient is φ = 121256166.

The previous prime is 121256153. The next prime is 121256183. The reversal of 121256167 is 761652121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121256167 - 2⁷ = 121256039 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121256117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60628083 + 60628084.

It is an arithmetic number, because the mean of its divisors is an integer number (60628084).

Almost surely, 2^121256167 is an apocalyptic number.

121256167 is a deficient number, since it is larger than the sum of its proper divisors (1).

121256167 is an equidigital number, since it uses as much as digits as its factorization.

121256167 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 121256167 is about 11011.6377982569. The cubic root of 121256167 is about 494.9575408264.

The spelling of 121256167 in words is "one hundred twenty-one million, two hundred fifty-six thousand, one hundred sixty-seven".