31043012113121 has 4 divisors (see below), whose sum is σ = 31205540972544. Its totient is φ = 30880483253700.

The previous prime is 31043012113117. The next prime is 31043012113129. The reversal of 31043012113121 is 12131121034013.

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 not a de Polignac number, because 31043012113121 - 2² = 31043012113117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31043012113129) 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, 81264429425 + ... + 81264429806.

It is an arithmetic number, because the mean of its divisors is an integer number (7801385243136).

Almost surely, 2^{31043012113121} is an apocalyptic number.

It is an amenable number.

31043012113121 is a deficient number, since it is larger than the sum of its proper divisors (162528859423).

31043012113121 is a wasteful number, since it uses less digits than its factorization.

31043012113121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162528859422.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 31043012113121 its reverse (12131121034013), we get a palindrome (43174133147134).

The spelling of 31043012113121 in words is "thirty-one trillion, forty-three billion, twelve million, one hundred thirteen thousand, one hundred twenty-one".