121650143 has 2 divisors, whose sum is σ = 121650144. Its totient is φ = 121650142.

The previous prime is 121650131. The next prime is 121650149. The reversal of 121650143 is 341056121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121650143 - 2⁴ = 121650127 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 (121650149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60825071 + 60825072.

It is an arithmetic number, because the mean of its divisors is an integer number (60825072).

Almost surely, 2^121650143 is an apocalyptic number.

121650143 is a deficient number, since it is larger than the sum of its proper divisors (1).

121650143 is an equidigital number, since it uses as much as digits as its factorization.

121650143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 121650143 is about 11029.5123645608. The cubic root of 121650143 is about 495.4930203348.

The spelling of 121650143 in words is "one hundred twenty-one million, six hundred fifty thousand, one hundred forty-three".