21210110222 has 8 divisors (see below), whose sum is σ = 36360188976. Its totient is φ = 9090047232.

The previous prime is 21210110183. The next prime is 21210110263. The reversal of 21210110222 is 22201101212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (14), and also a Moran number because the ratio is a prime number: 1515007873 = 21210110222 / (2 + 1 + 2 + 1 + 0 + 1 + 1 + 0 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 21210110197 and 21210110206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 757503923 + ... + 757503950.

It is an arithmetic number, because the mean of its divisors is an integer number (4545023622).

Almost surely, 2^21210110222 is an apocalyptic number.

21210110222 is a deficient number, since it is larger than the sum of its proper divisors (15150078754).

21210110222 is a wasteful number, since it uses less digits than its factorization.

21210110222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515007882.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21210110222 its reverse (22201101212), we get a palindrome (43411211434).

The spelling of 21210110222 in words is "twenty-one billion, two hundred ten million, one hundred ten thousand, two hundred twenty-two".