201211120011111 has 32 divisors (see below), whose sum is σ = 316675096117248. Its totient is φ = 111206555773920.

The previous prime is 201211120011103. The next prime is 201211120011131. The reversal of 201211120011111 is 111110021112102.

It is not a de Polignac number, because 201211120011111 - 2³ = 201211120011103 is a prime.

It is a super-2 number, since 2×201211120011111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211120011131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85316815 + ... + 87643488.

It is an arithmetic number, because the mean of its divisors is an integer number (9896096753664).

Almost surely, 2^{201211120011111} is an apocalyptic number.

201211120011111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

201211120011111 is a deficient number, since it is larger than the sum of its proper divisors (115463976106137).

201211120011111 is a wasteful number, since it uses less digits than its factorization.

201211120011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172962131.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 201211120011111 its reverse (111110021112102), we get a palindrome (312321141123213).

The spelling of 201211120011111 in words is "two hundred one trillion, two hundred eleven billion, one hundred twenty million, eleven thousand, one hundred eleven".