21067207222 has 4 divisors (see below), whose sum is σ = 31600810836. Its totient is φ = 10533603610.

The previous prime is 21067207171. The next prime is 21067207247. The reversal of 21067207222 is 22270276012.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 as a sum of consecutive naturals, namely, 5266801804 + ... + 5266801807.

It is an arithmetic number, because the mean of its divisors is an integer number (7900202709).

Almost surely, 2^21067207222 is an apocalyptic number.

21067207222 is a deficient number, since it is larger than the sum of its proper divisors (10533603614).

21067207222 is a wasteful number, since it uses less digits than its factorization.

21067207222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10533603613.

The product of its (nonzero) digits is 9408, while the sum is 31.

The spelling of 21067207222 in words is "twenty-one billion, sixty-seven million, two hundred seven thousand, two hundred twenty-two".