20111122112201 has 4 divisors (see below), whose sum is σ = 20157568122132. Its totient is φ = 20064676102272.

The previous prime is 20111122112171. The next prime is 20111122112231. The reversal of 20111122112201 is 10221122111102.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20111122112171) and next prime (20111122112231).

It can be written as a sum of positive squares in 2 ways, for example, as 11377796863801 + 8733325248400 = 3373099^2 + 2955220^2 .

It is a cyclic number.

It is not a de Polignac number, because 20111122112201 - 2¹⁴ = 20111122095817 is a prime.

It is a super-2 number, since 2×20111122112201² (a number of 27 digits) contains 22 as substring.

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 20111122112201.

It is not an unprimeable number, because it can be changed into a prime (20111122112231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23223004316 + ... + 23223005181.

It is an arithmetic number, because the mean of its divisors is an integer number (5039392030533).

Almost surely, 2^{20111122112201} is an apocalyptic number.

It is an amenable number.

20111122112201 is a deficient number, since it is larger than the sum of its proper divisors (46446009931).

20111122112201 is an equidigital number, since it uses as much as digits as its factorization.

20111122112201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46446009930.

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

Adding to 20111122112201 its reverse (10221122111102), we get a palindrome (30332244223303).

The spelling of 20111122112201 in words is "twenty trillion, one hundred eleven billion, one hundred twenty-two million, one hundred twelve thousand, two hundred one".