21110111222 has 8 divisors (see below), whose sum is σ = 31740382272. Its totient is φ = 10529983800.

The previous prime is 21110111219. The next prime is 21110111249. The reversal of 21110111222 is 22211101112.

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 = 21110111197 and 21110111206.

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, 12534854 + ... + 12536537.

It is an arithmetic number, because the mean of its divisors is an integer number (3967547784).

Almost surely, 2^21110111222 is an apocalyptic number.

21110111222 is a deficient number, since it is larger than the sum of its proper divisors (10630271050).

21110111222 is a wasteful number, since it uses less digits than its factorization.

21110111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25071814.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21110111222 its reverse (22211101112), we get a palindrome (43321212334).

It can be divided in two parts, 211101112 and 22, that multiplied together give a palindrome (4644224464).

The spelling of 21110111222 in words is "twenty-one billion, one hundred ten million, one hundred eleven thousand, two hundred twenty-two".