31031231000001 has 4 divisors (see below), whose sum is σ = 41374974666672. Its totient is φ = 20687487333332.

The previous prime is 31031230999999. The next prime is 31031231000027. The reversal of 31031231000001 is 10000013213013.

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 31031231000001 - 2¹ = 31031230999999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31031231000051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5171871833331 + ... + 5171871833336.

It is an arithmetic number, because the mean of its divisors is an integer number (10343743666668).

Almost surely, 2^{31031231000001} is an apocalyptic number.

It is an amenable number.

31031231000001 is a deficient number, since it is larger than the sum of its proper divisors (10343743666671).

31031231000001 is a wasteful number, since it uses less digits than its factorization.

31031231000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10343743666670.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 31031231000001 its reverse (10000013213013), we get a palindrome (41031244213014).

The spelling of 31031231000001 in words is "thirty-one trillion, thirty-one billion, two hundred thirty-one million, one", and thus it is an aban number.