31334130221 has 6 divisors (see below), whose sum is σ = 32451876522. Its totient is φ = 30253642160.

The previous prime is 31334130211. The next prime is 31334130263. The reversal of 31334130221 is 12203143313.

It can be written as a sum of positive squares in 3 ways, for example, as 54316900 + 31279813321 = 7370^2 + 176861^2 .

It is not a de Polignac number, because 31334130221 - 2¹⁸ = 31333868077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31334130211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18628250 + ... + 18629931.

It is an arithmetic number, because the mean of its divisors is an integer number (5408646087).

Almost surely, 2^31334130221 is an apocalyptic number.

It is an amenable number.

31334130221 is a deficient number, since it is larger than the sum of its proper divisors (1117746301).

31334130221 is an equidigital number, since it uses as much as digits as its factorization.

31334130221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37258239 (or 37258210 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31334130221 its reverse (12203143313), we get a palindrome (43537273534).

The spelling of 31334130221 in words is "thirty-one billion, three hundred thirty-four million, one hundred thirty thousand, two hundred twenty-one".