20112112221101 has 16 divisors (see below), whose sum is σ = 21116751404544. Its totient is φ = 19118416673664.

The previous prime is 20112112221049. The next prime is 20112112221133. The reversal of 20112112221101 is 10112221121102.

It is a cyclic number.

It is not a de Polignac number, because 20112112221101 - 2²² = 20112108026797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20112112221101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112112211101) 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, 8394860 + ... + 10521306.

It is an arithmetic number, because the mean of its divisors is an integer number (1319796962784).

Almost surely, 2^{20112112221101} is an apocalyptic number.

It is an amenable number.

20112112221101 is a deficient number, since it is larger than the sum of its proper divisors (1004639183443).

20112112221101 is a wasteful number, since it uses less digits than its factorization.

20112112221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129020.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 20112112221101 its reverse (10112221121102), we get a palindrome (30224333342203).

The spelling of 20112112221101 in words is "twenty trillion, one hundred twelve billion, one hundred twelve million, two hundred twenty-one thousand, one hundred one".