21122221100110 has 32 divisors (see below), whose sum is σ = 41052646585440. Its totient is φ = 7778396158848.

The previous prime is 21122221100047. The next prime is 21122221100117. The reversal of 21122221100110 is 1100112222112.

It is a super-2 number, since 2×21122221100110² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122221100117) 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, 214302477 + ... + 214401016.

It is an arithmetic number, because the mean of its divisors is an integer number (1282895205795).

Almost surely, 2^{21122221100110} is an apocalyptic number.

21122221100110 is a deficient number, since it is larger than the sum of its proper divisors (19930425485330).

21122221100110 is a wasteful number, since it uses less digits than its factorization.

21122221100110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428703892.

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

Adding to 21122221100110 its reverse (1100112222112), we get a palindrome (22222333322222).

The spelling of 21122221100110 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred twenty-one million, one hundred thousand, one hundred ten".