211101200020111 has 4 divisors (see below), whose sum is σ = 217910916149824. Its totient is φ = 204291483890400.

The previous prime is 211101200020103. The next prime is 211101200020129. The reversal of 211101200020111 is 111020002101112.

It is a happy number.

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 211101200020111 - 2³ = 211101200020103 is a prime.

It is a super-3 number, since 3×211101200020111³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211101200020091 and 211101200020100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211101200020141) 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, 3404858064810 + ... + 3404858064871.

It is an arithmetic number, because the mean of its divisors is an integer number (54477729037456).

Almost surely, 2^{211101200020111} is an apocalyptic number.

211101200020111 is a deficient number, since it is larger than the sum of its proper divisors (6809716129713).

211101200020111 is an equidigital number, since it uses as much as digits as its factorization.

211101200020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6809716129712.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 211101200020111 its reverse (111020002101112), we get a palindrome (322121202121223).

The spelling of 211101200020111 in words is "two hundred eleven trillion, one hundred one billion, two hundred million, twenty thousand, one hundred eleven".