21112101221110 has 16 divisors (see below), whose sum is σ = 38020149457200. Its totient is φ = 8440758875296.

The previous prime is 21112101221041. The next prime is 21112101221117. The reversal of 21112101221110 is 1112210121112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112101221117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510179920 + ... + 510221299.

It is an arithmetic number, because the mean of its divisors is an integer number (2376259341075).

Almost surely, 2^{21112101221110} is an apocalyptic number.

21112101221110 is a deficient number, since it is larger than the sum of its proper divisors (16908048236090).

21112101221110 is a wasteful number, since it uses less digits than its factorization.

21112101221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020403295.

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

Adding to 21112101221110 its reverse (1112210121112), we get a palindrome (22224311342222).

The spelling of 21112101221110 in words is "twenty-one trillion, one hundred twelve billion, one hundred one million, two hundred twenty-one thousand, one hundred ten".