21111100102222 has 64 divisors (see below), whose sum is σ = 35511071016960. Its totient is φ = 9349911417600.

The previous prime is 21111100102199. The next prime is 21111100102241. The reversal of 21111100102222 is 22220100111112.

It is a junction number, because it is equal to n+sod(n) for n = 21111100102196 and 21111100102205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21671697 + ... + 22624867.

It is an arithmetic number, because the mean of its divisors is an integer number (554860484640).

Almost surely, 2^{21111100102222} is an apocalyptic number.

21111100102222 is a deficient number, since it is larger than the sum of its proper divisors (14399970914738).

21111100102222 is a wasteful number, since it uses less digits than its factorization.

21111100102222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953569.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21111100102222 its reverse (22220100111112), we get a palindrome (43331200213334).

The spelling of 21111100102222 in words is "twenty-one trillion, one hundred eleven billion, one hundred million, one hundred two thousand, two hundred twenty-two".