21111102221110 has 32 divisors (see below), whose sum is σ = 41953980160512. Its totient is φ = 7584273302880.

The previous prime is 21111102221107. The next prime is 21111102221117. The reversal of 21111102221110 is 1112220111112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111102221117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1156130094 + ... + 1156148353.

It is an arithmetic number, because the mean of its divisors is an integer number (1311061880016).

Almost surely, 2^{21111102221110} is an apocalyptic number.

21111102221110 is a deficient number, since it is larger than the sum of its proper divisors (20842877939402).

21111102221110 is a wasteful number, since it uses less digits than its factorization.

21111102221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2312278548.

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

Adding to 21111102221110 its reverse (1112220111112), we get a palindrome (22223322332222).

The spelling of 21111102221110 in words is "twenty-one trillion, one hundred eleven billion, one hundred two million, two hundred twenty-one thousand, one hundred ten".