121321143 has 12 divisors (see below), whose sum is σ = 176030400. Its totient is φ = 80516736.

The previous prime is 121321139. The next prime is 121321153. The reversal of 121321143 is 341123121.

It is not a de Polignac number, because 121321143 - 2² = 121321139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121321133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28218 + ... + 32231.

It is an arithmetic number, because the mean of its divisors is an integer number (14669200).

Almost surely, 2^121321143 is an apocalyptic number.

121321143 is a deficient number, since it is larger than the sum of its proper divisors (54709257).

121321143 is a wasteful number, since it uses less digits than its factorization.

121321143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60678 (or 60675 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 121321143 is about 11014.5877362705. The cubic root of 121321143 is about 495.0459339070.

Adding to 121321143 its reverse (341123121), we get a palindrome (462444264).

The spelling of 121321143 in words is "one hundred twenty-one million, three hundred twenty-one thousand, one hundred forty-three".