31130221132 has 24 divisors (see below), whose sum is σ = 54805645440. Its totient is φ = 15471550080.

The previous prime is 31130221121. The next prime is 31130221159. The reversal of 31130221132 is 23112203113.

It is a super-2 number, since 2×31130221132² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1653669 + ... + 1672387.

It is an arithmetic number, because the mean of its divisors is an integer number (2283568560).

Almost surely, 2^31130221132 is an apocalyptic number.

It is an amenable number.

31130221132 is a deficient number, since it is larger than the sum of its proper divisors (23675424308).

31130221132 is a wasteful number, since it uses less digits than its factorization.

31130221132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21201 (or 21199 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31130221132 its reverse (23112203113), we get a palindrome (54242424245).

The spelling of 31130221132 in words is "thirty-one billion, one hundred thirty million, two hundred twenty-one thousand, one hundred thirty-two".