21112100222 has 8 divisors (see below), whose sum is σ = 31718339472. Its totient is φ = 10539320400.

The previous prime is 21112100209. The next prime is 21112100239. The reversal of 21112100222 is 22200121112.

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 = 21112100197 and 21112100206.

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, 8363279 + ... + 8365802.

It is an arithmetic number, because the mean of its divisors is an integer number (3964792434).

Almost surely, 2^21112100222 is an apocalyptic number.

21112100222 is a deficient number, since it is larger than the sum of its proper divisors (10606239250).

21112100222 is a wasteful number, since it uses less digits than its factorization.

21112100222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16729714.

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

Adding to 21112100222 its reverse (22200121112), we get a palindrome (43312221334).

The spelling of 21112100222 in words is "twenty-one billion, one hundred twelve million, one hundred thousand, two hundred twenty-two".