21031030222 has 8 divisors (see below), whose sum is σ = 31858887672. Its totient is φ = 10411401000.

The previous prime is 21031030217. The next prime is 21031030243. The reversal of 21031030222 is 22203013012.

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 = 21031030196 and 21031030205.

It is a congruent number.

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, 52056804 + ... + 52057207.

It is an arithmetic number, because the mean of its divisors is an integer number (3982360959).

Almost surely, 2^21031030222 is an apocalyptic number.

21031030222 is a deficient number, since it is larger than the sum of its proper divisors (10827857450).

21031030222 is a wasteful number, since it uses less digits than its factorization.

21031030222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104114114.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21031030222 its reverse (22203013012), we get a palindrome (43234043234).

The spelling of 21031030222 in words is "twenty-one billion, thirty-one million, thirty thousand, two hundred twenty-two".