121243143313 has 8 divisors (see below), whose sum is σ = 121343910120. Its totient is φ = 121142419200.

The previous prime is 121243143257. The next prime is 121243143337. The reversal of 121243143313 is 313341342121.

It can be written as a sum of positive squares in 4 ways, for example, as 16314441984 + 104928701329 = 127728^2 + 323927^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121243143313 - 2²¹ = 121241046161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121243153313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7932843 + ... + 7948111.

It is an arithmetic number, because the mean of its divisors is an integer number (15167988765).

Almost surely, 2^121243143313 is an apocalyptic number.

It is an amenable number.

121243143313 is a deficient number, since it is larger than the sum of its proper divisors (100766807).

121243143313 is a wasteful number, since it uses less digits than its factorization.

121243143313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21347.

The product of its digits is 5184, while the sum is 28.

Adding to 121243143313 its reverse (313341342121), we get a palindrome (434584485434).

The spelling of 121243143313 in words is "one hundred twenty-one billion, two hundred forty-three million, one hundred forty-three thousand, three hundred thirteen".