21124220222 has 8 divisors (see below), whose sum is σ = 36212948976. Its totient is φ = 9053237232.

The previous prime is 21124220177. The next prime is 21124220263. The reversal of 21124220222 is 22202242112.

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 = 21124220194 and 21124220203.

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, 754436423 + ... + 754436450.

It is an arithmetic number, because the mean of its divisors is an integer number (4526618622).

Almost surely, 2^21124220222 is an apocalyptic number.

21124220222 is a deficient number, since it is larger than the sum of its proper divisors (15088728754).

21124220222 is a wasteful number, since it uses less digits than its factorization.

21124220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508872882.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21124220222 its reverse (22202242112), we get a palindrome (43326462334).

The spelling of 21124220222 in words is "twenty-one billion, one hundred twenty-four million, two hundred twenty thousand, two hundred twenty-two".