31221224330 has 8 divisors (see below), whose sum is σ = 56198203812. Its totient is φ = 12488489728.

The previous prime is 31221224329. The next prime is 31221224383. The reversal of 31221224330 is 3342212213.

It can be written as a sum of positive squares in 2 ways, for example, as 30304890889 + 916333441 = 174083^2 + 30271^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 31221224296 and 31221224305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1561061207 + ... + 1561061226.

Almost surely, 2^31221224330 is an apocalyptic number.

31221224330 is a deficient number, since it is larger than the sum of its proper divisors (24976979482).

31221224330 is a wasteful number, since it uses less digits than its factorization.

31221224330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3122122440.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31221224330 its reverse (3342212213), we get a palindrome (34563436543).

The spelling of 31221224330 in words is "thirty-one billion, two hundred twenty-one million, two hundred twenty-four thousand, three hundred thirty".