20112001111211 has 4 divisors (see below), whose sum is σ = 20119639549512. Its totient is φ = 20104362672912.

The previous prime is 20112001111133. The next prime is 20112001111243. The reversal of 20112001111211 is 11211110021102.

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

It is a cyclic number.

It is not a de Polignac number, because 20112001111211 - 2¹⁸ = 20112000849067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20112001117211) 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, 3819215201 + ... + 3819220466.

It is an arithmetic number, because the mean of its divisors is an integer number (5029909887378).

Almost surely, 2^{20112001111211} is an apocalyptic number.

20112001111211 is a deficient number, since it is larger than the sum of its proper divisors (7638438301).

20112001111211 is an equidigital number, since it uses as much as digits as its factorization.

20112001111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7638438300.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 20112001111211 its reverse (11211110021102), we get a palindrome (31323111132313).

The spelling of 20112001111211 in words is "twenty trillion, one hundred twelve billion, one million, one hundred eleven thousand, two hundred eleven".