121633143 has 4 divisors (see below), whose sum is σ = 162177528. Its totient is φ = 81088760.

The previous prime is 121633129. The next prime is 121633159. The reversal of 121633143 is 341336121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121633143 - 2⁸ = 121632887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121633103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20272188 + ... + 20272193.

It is an arithmetic number, because the mean of its divisors is an integer number (40544382).

Almost surely, 2^121633143 is an apocalyptic number.

121633143 is a deficient number, since it is larger than the sum of its proper divisors (40544385).

121633143 is an equidigital number, since it uses as much as digits as its factorization.

121633143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40544384.

The product of its digits is 1296, while the sum is 24.

The square root of 121633143 is about 11028.7416779975. The cubic root of 121633143 is about 495.4699383678.

Adding to 121633143 its reverse (341336121), we get a palindrome (462969264).

The spelling of 121633143 in words is "one hundred twenty-one million, six hundred thirty-three thousand, one hundred forty-three".