31220130222 has 12 divisors (see below), whose sum is σ = 67643615520. Its totient is φ = 10406710068.

The previous prime is 31220130203. The next prime is 31220130223. The reversal of 31220130222 is 22203102213.

31220130222 is a `hidden beast` number, since 312 + 2 + 0 + 130 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1734451679 = 31220130222 / (3 + 1 + 2 + 2 + 0 + 1 + 3 + 0 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 31220130195 and 31220130204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220130223) 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 5 ways as a sum of consecutive naturals, for example, 867225822 + ... + 867225857.

It is an arithmetic number, because the mean of its divisors is an integer number (5636967960).

Almost surely, 2^31220130222 is an apocalyptic number.

31220130222 is an abundant number, since it is smaller than the sum of its proper divisors (36423485298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31220130222 is a wasteful number, since it uses less digits than its factorization.

31220130222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734451687 (or 1734451684 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 31220130222 its reverse (22203102213), we get a palindrome (53423232435).

The spelling of 31220130222 in words is "thirty-one billion, two hundred twenty million, one hundred thirty thousand, two hundred twenty-two".