31103300221 has 24 divisors (see below), whose sum is σ = 36735166656. Its totient is φ = 26252835840.

The previous prime is 31103300171. The next prime is 31103300227. The reversal of 31103300221 is 12200330113.

It is not a de Polignac number, because 31103300221 - 2⁹ = 31103299709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31103300195 and 31103300204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103300227) 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 23 ways as a sum of consecutive naturals, for example, 3150525 + ... + 3160381.

It is an arithmetic number, because the mean of its divisors is an integer number (1530631944).

Almost surely, 2^31103300221 is an apocalyptic number.

It is an amenable number.

31103300221 is a deficient number, since it is larger than the sum of its proper divisors (5631866435).

31103300221 is an equidigital number, since it uses as much as digits as its factorization.

31103300221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10849 (or 10842 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31103300221 its reverse (12200330113), we get a palindrome (43303630334).

The spelling of 31103300221 in words is "thirty-one billion, one hundred three million, three hundred thousand, two hundred twenty-one".