121356143 has 2 divisors, whose sum is σ = 121356144. Its totient is φ = 121356142.

The previous prime is 121356127. The next prime is 121356161. The reversal of 121356143 is 341653121.

It is a weak prime.

It is an emirp because it is prime and its reverse (341653121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121356143 - 2⁴ = 121356127 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121356163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60678071 + 60678072.

It is an arithmetic number, because the mean of its divisors is an integer number (60678072).

Almost surely, 2^121356143 is an apocalyptic number.

121356143 is a deficient number, since it is larger than the sum of its proper divisors (1).

121356143 is an equidigital number, since it uses as much as digits as its factorization.

121356143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 121356143 is about 11016.1764237870. The cubic root of 121356143 is about 495.0935346833.

The spelling of 121356143 in words is "one hundred twenty-one million, three hundred fifty-six thousand, one hundred forty-three".