20111112201 has 8 divisors (see below), whose sum is σ = 27539541184. Its totient is φ = 13045045680.

The previous prime is 20111112199. The next prime is 20111112221. The reversal of 20111112201 is 10221111102.

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

It is not a de Polignac number, because 20111112201 - 2¹ = 20111112199 is a prime.

It is a super-2 number, since 2×20111112201² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111112221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90590485 + ... + 90590706.

It is an arithmetic number, because the mean of its divisors is an integer number (3442442648).

Almost surely, 2^20111112201 is an apocalyptic number.

It is an amenable number.

20111112201 is a deficient number, since it is larger than the sum of its proper divisors (7428428983).

20111112201 is a wasteful number, since it uses less digits than its factorization.

20111112201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181181231.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20111112201 its reverse (10221111102), we get a palindrome (30332223303).

It can be divided in two parts, 201111 and 12201, that added together give a palindrome (213312).

The spelling of 20111112201 in words is "twenty billion, one hundred eleven million, one hundred twelve thousand, two hundred one".