21033211222 has 4 divisors (see below), whose sum is σ = 31549816836. Its totient is φ = 10516605610.

The previous prime is 21033211219. The next prime is 21033211237. The reversal of 21033211222 is 22211233012.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21033211222.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5258302804 + ... + 5258302807.

It is an arithmetic number, because the mean of its divisors is an integer number (7887454209).

Almost surely, 2^21033211222 is an apocalyptic number.

21033211222 is a deficient number, since it is larger than the sum of its proper divisors (10516605614).

21033211222 is a wasteful number, since it uses less digits than its factorization.

21033211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10516605613.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21033211222 its reverse (22211233012), we get a palindrome (43244444234).

The spelling of 21033211222 in words is "twenty-one billion, thirty-three million, two hundred eleven thousand, two hundred twenty-two".