31130022221 has 8 divisors (see below), whose sum is σ = 32619421440. Its totient is φ = 29651949712.

The previous prime is 31130022197. The next prime is 31130022223. The reversal of 31130022221 is 12222003113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31130022221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31130022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130022223) 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 7 ways as a sum of consecutive naturals, for example, 2826050 + ... + 2837043.

It is an arithmetic number, because the mean of its divisors is an integer number (4077427680).

Almost surely, 2^31130022221 is an apocalyptic number.

It is an amenable number.

31130022221 is a deficient number, since it is larger than the sum of its proper divisors (1489399219).

31130022221 is a wasteful number, since it uses less digits than its factorization.

31130022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5663355.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31130022221 its reverse (12222003113), we get a palindrome (43352025334).

The spelling of 31130022221 in words is "thirty-one billion, one hundred thirty million, twenty-two thousand, two hundred twenty-one".