121366143 has 6 divisors (see below), whose sum is σ = 175306664. Its totient is φ = 80910756.

The previous prime is 121366139. The next prime is 121366151. The reversal of 121366143 is 341663121.

121366143 is a `hidden beast` number, since 12 + 1 + 36 + 614 + 3 = 666.

It is not a de Polignac number, because 121366143 - 2² = 121366139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121366123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6742555 + ... + 6742572.

Almost surely, 2^121366143 is an apocalyptic number.

121366143 is a deficient number, since it is larger than the sum of its proper divisors (53940521).

121366143 is a wasteful number, since it uses less digits than its factorization.

121366143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13485133 (or 13485130 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 121366143 is about 11016.6302924261. The cubic root of 121366143 is about 495.1071332240.

The spelling of 121366143 in words is "one hundred twenty-one million, three hundred sixty-six thousand, one hundred forty-three".