121343431013 has 16 divisors (see below), whose sum is σ = 140607980160. Its totient is φ = 102561935616.

The previous prime is 121343431003. The next prime is 121343431081. The reversal of 121343431013 is 310134343121.

It is not a de Polignac number, because 121343431013 - 2¹⁰ = 121343429989 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 (121343431003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2639006 + ... + 2684592.

It is an arithmetic number, because the mean of its divisors is an integer number (8787998760).

Almost surely, 2^121343431013 is an apocalyptic number.

It is an amenable number.

121343431013 is a deficient number, since it is larger than the sum of its proper divisors (19264549147).

121343431013 is an equidigital number, since it uses as much as digits as its factorization.

121343431013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50876.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 121343431013 its reverse (310134343121), we get a palindrome (431477774134).

The spelling of 121343431013 in words is "one hundred twenty-one billion, three hundred forty-three million, four hundred thirty-one thousand, thirteen".