31431343411121 has 4 divisors (see below), whose sum is σ = 31431452683632. Its totient is φ = 31431234138612.

The previous prime is 31431343411063. The next prime is 31431343411163. The reversal of 31431343411121 is 12111434313413.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31431343411121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31431343431121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54203651 + ... + 54780456.

It is an arithmetic number, because the mean of its divisors is an integer number (7857863170908).

Almost surely, 2^{31431343411121} is an apocalyptic number.

It is an amenable number.

31431343411121 is a deficient number, since it is larger than the sum of its proper divisors (109272511).

31431343411121 is a wasteful number, since it uses less digits than its factorization.

31431343411121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109272510.

The product of its digits is 10368, while the sum is 32.

Adding to 31431343411121 its reverse (12111434313413), we get a palindrome (43542777724534).

The spelling of 31431343411121 in words is "thirty-one trillion, four hundred thirty-one billion, three hundred forty-three million, four hundred eleven thousand, one hundred twenty-one".