21124022222 has 8 divisors (see below), whose sum is σ = 31700166696. Its totient is φ = 10557299992.

The previous prime is 21124022167. The next prime is 21124022239. The reversal of 21124022222 is 22222042112.

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 = 21124022194 and 21124022203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2349953 + ... + 2358924.

It is an arithmetic number, because the mean of its divisors is an integer number (3962520837).

Almost surely, 2^21124022222 is an apocalyptic number.

21124022222 is a deficient number, since it is larger than the sum of its proper divisors (10576144474).

21124022222 is a wasteful number, since it uses less digits than its factorization.

21124022222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4711122.

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

Adding to 21124022222 its reverse (22222042112), we get a palindrome (43346064334).

The spelling of 21124022222 in words is "twenty-one billion, one hundred twenty-four million, twenty-two thousand, two hundred twenty-two".