31130301321 has 32 divisors (see below), whose sum is σ = 53494087680. Its totient is φ = 17523232848.

The previous prime is 31130301317. The next prime is 31130301359. The reversal of 31130301321 is 12310303113.

It is a happy number.

31130301321 is a `hidden beast` number, since 3 + 11 + 30 + 301 + 321 = 666.

It is not a de Polignac number, because 31130301321 - 2² = 31130301317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31130301294 and 31130301303.

It is not an unprimeable number, because it can be changed into a prime (31130301221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1216521 + ... + 1241846.

It is an arithmetic number, because the mean of its divisors is an integer number (1671690240).

Almost surely, 2^31130301321 is an apocalyptic number.

It is an amenable number.

31130301321 is a deficient number, since it is larger than the sum of its proper divisors (22363786359).

31130301321 is a wasteful number, since it uses less digits than its factorization.

31130301321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2458450 (or 2458444 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31130301321 its reverse (12310303113), we get a palindrome (43440604434).

The spelling of 31130301321 in words is "thirty-one billion, one hundred thirty million, three hundred one thousand, three hundred twenty-one".