21031330222 has 32 divisors (see below), whose sum is σ = 36658600704. Its totient is φ = 8862955200.

The previous prime is 21031330181. The next prime is 21031330231. The reversal of 21031330222 is 22203313012.

It is a self number, because there is not a number n which added to its sum of digits gives 21031330222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307197 + ... + 369367.

It is an arithmetic number, because the mean of its divisors is an integer number (1145581272).

Almost surely, 2^21031330222 is an apocalyptic number.

21031330222 is a deficient number, since it is larger than the sum of its proper divisors (15627270482).

21031330222 is a wasteful number, since it uses less digits than its factorization.

21031330222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62584.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21031330222 its reverse (22203313012), we get a palindrome (43234643234).

The spelling of 21031330222 in words is "twenty-one billion, thirty-one million, three hundred thirty thousand, two hundred twenty-two".