121303313143 has 4 divisors (see below), whose sum is σ = 125486186040. Its totient is φ = 117120440248.

The previous prime is 121303313141. The next prime is 121303313147. The reversal of 121303313143 is 341313303121.

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 121303313143 - 2¹ = 121303313141 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 (121303313141) 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, 2091436405 + ... + 2091436462.

It is an arithmetic number, because the mean of its divisors is an integer number (31371546510).

Almost surely, 2^121303313143 is an apocalyptic number.

121303313143 is a deficient number, since it is larger than the sum of its proper divisors (4182872897).

121303313143 is an equidigital number, since it uses as much as digits as its factorization.

121303313143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4182872896.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 121303313143 its reverse (341313303121), we get a palindrome (462616616264).

The spelling of 121303313143 in words is "one hundred twenty-one billion, three hundred three million, three hundred thirteen thousand, one hundred forty-three".