20112201021111 has 8 divisors (see below), whose sum is σ = 27982192725120. Its totient is φ = 12825171665592.

The previous prime is 20112201021109. The next prime is 20112201021137. The reversal of 20112201021111 is 11112010221102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20112201021111 - 2¹ = 20112201021109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112201021811) 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, 145740587041 + ... + 145740587178.

It is an arithmetic number, because the mean of its divisors is an integer number (3497774090640).

Almost surely, 2^{20112201021111} is an apocalyptic number.

20112201021111 is a deficient number, since it is larger than the sum of its proper divisors (7869991704009).

20112201021111 is a wasteful number, since it uses less digits than its factorization.

20112201021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291481174245.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20112201021111 its reverse (11112010221102), we get a palindrome (31224211242213).

The spelling of 20112201021111 in words is "twenty trillion, one hundred twelve billion, two hundred one million, twenty-one thousand, one hundred eleven".