121421159 has 2 divisors, whose sum is σ = 121421160. Its totient is φ = 121421158.

The previous prime is 121421137. The next prime is 121421177. The reversal of 121421159 is 951124121.

It is a strong prime.

It is an emirp because it is prime and its reverse (951124121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121421159 - 2⁸ = 121420903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121421129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60710579 + 60710580.

It is an arithmetic number, because the mean of its divisors is an integer number (60710580).

Almost surely, 2^121421159 is an apocalyptic number.

121421159 is a deficient number, since it is larger than the sum of its proper divisors (1).

121421159 is an equidigital number, since it uses as much as digits as its factorization.

121421159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 26.

The square root of 121421159 is about 11019.1269617879. The cubic root of 121421159 is about 495.1819335996.

The spelling of 121421159 in words is "one hundred twenty-one million, four hundred twenty-one thousand, one hundred fifty-nine".