31043122221 has 32 divisors (see below), whose sum is σ = 44204071680. Its totient is φ = 19310206976.

The previous prime is 31043122207. The next prime is 31043122237. The reversal of 31043122221 is 12222134013.

It is not a de Polignac number, because 31043122221 - 2⁵ = 31043122189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31043122321) 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 31 ways as a sum of consecutive naturals, for example, 6194965 + ... + 6199973.

It is an arithmetic number, because the mean of its divisors is an integer number (1381377240).

Almost surely, 2^31043122221 is an apocalyptic number.

It is an amenable number.

31043122221 is a deficient number, since it is larger than the sum of its proper divisors (13160949459).

31043122221 is a wasteful number, since it uses less digits than its factorization.

31043122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6053.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 31043122221 its reverse (12222134013), we get a palindrome (43265256234).

The spelling of 31043122221 in words is "thirty-one billion, forty-three million, one hundred twenty-two thousand, two hundred twenty-one".