121221167 has 2 divisors, whose sum is σ = 121221168. Its totient is φ = 121221166.

The previous prime is 121221103. The next prime is 121221173. The reversal of 121221167 is 761122121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121221167 - 2⁶ = 121221103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121220167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610583 + 60610584.

It is an arithmetic number, because the mean of its divisors is an integer number (60610584).

Almost surely, 2^121221167 is an apocalyptic number.

121221167 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221167 is an equidigital number, since it uses as much as digits as its factorization.

121221167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 23.

The square root of 121221167 is about 11010.0484558425. The cubic root of 121221167 is about 494.9099138853.

Adding to 121221167 its reverse (761122121), we get a palindrome (882343288).

The spelling of 121221167 in words is "one hundred twenty-one million, two hundred twenty-one thousand, one hundred sixty-seven".