21111100111022 has 16 divisors (see below), whose sum is σ = 32070351872592. Its totient is φ = 10421800858560.

The previous prime is 21111100111009. The next prime is 21111100111061. The reversal of 21111100111022 is 22011100111112.

It is a junction number, because it is equal to n+sod(n) for n = 21111100110988 and 21111100111006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204457823 + ... + 204561050.

It is an arithmetic number, because the mean of its divisors is an integer number (2004396992037).

Almost surely, 2^{21111100111022} is an apocalyptic number.

21111100111022 is a deficient number, since it is larger than the sum of its proper divisors (10959251761570).

21111100111022 is a wasteful number, since it uses less digits than its factorization.

21111100111022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409019203.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21111100111022 its reverse (22011100111112), we get a palindrome (43122200222134).

The spelling of 21111100111022 in words is "twenty-one trillion, one hundred eleven billion, one hundred million, one hundred eleven thousand, twenty-two".