21111110222 has 8 divisors (see below), whose sum is σ = 32758619400. Its totient is φ = 10191570424.

The previous prime is 21111110161. The next prime is 21111110231. The reversal of 21111110222 is 22201111112.

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

It is a super-3 number, since 3×21111110222³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21111110197 and 21111110206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181992272 + ... + 181992387.

It is an arithmetic number, because the mean of its divisors is an integer number (4094827425).

Almost surely, 2^21111110222 is an apocalyptic number.

21111110222 is a deficient number, since it is larger than the sum of its proper divisors (11647509178).

21111110222 is a wasteful number, since it uses less digits than its factorization.

21111110222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363984690.

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

Adding to 21111110222 its reverse (22201111112), we get a palindrome (43312221334).

The spelling of 21111110222 in words is "twenty-one billion, one hundred eleven million, one hundred ten thousand, two hundred twenty-two".