31041121 has 2 divisors, whose sum is σ = 31041122. Its totient is φ = 31041120.

The previous prime is 31041089. The next prime is 31041161. The reversal of 31041121 is 12114013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20151121 + 10890000 = 4489^2 + 3300^2 .

It is a cyclic number.

It is not a de Polignac number, because 31041121 - 2⁵ = 31041089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31041161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15520560 + 15520561.

It is an arithmetic number, because the mean of its divisors is an integer number (15520561).

Almost surely, 2^31041121 is an apocalyptic number.

It is an amenable number.

31041121 is a deficient number, since it is larger than the sum of its proper divisors (1).

31041121 is an equidigital number, since it uses as much as digits as its factorization.

31041121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 31041121 is about 5571.4559138523. The cubic root of 31041121 is about 314.2769035606.

Adding to 31041121 its reverse (12114013), we get a palindrome (43155134).

It can be divided in two parts, 3104 and 1121, that added together give a square (4225 = 65²).

The spelling of 31041121 in words is "thirty-one million, forty-one thousand, one hundred twenty-one".