211012120111 has 4 divisors (see below), whose sum is σ = 227243821672. Its totient is φ = 194780418552.

The previous prime is 211012120003. The next prime is 211012120117. The reversal of 211012120111 is 111021210112.

It is a happy number.

211012120111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 211012120111 - 2⁹ = 211012119599 is a prime.

It is a super-2 number, since 2×211012120111² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 16231701547 = 211012120111 / (2 + 1 + 1 + 0 + 1 + 2 + 1 + 2 + 0 + 1 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211012120091 and 211012120100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211012120117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8115850761 + ... + 8115850786.

It is an arithmetic number, because the mean of its divisors is an integer number (56810955418).

Almost surely, 2^211012120111 is an apocalyptic number.

211012120111 is a deficient number, since it is larger than the sum of its proper divisors (16231701561).

211012120111 is a wasteful number, since it uses less digits than its factorization.

211012120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16231701560.

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

Adding to 211012120111 its reverse (111021210112), we get a palindrome (322033330223).

Subtracting from 211012120111 its reverse (111021210112), we obtain a palindrome (99990909999).

The spelling of 211012120111 in words is "two hundred eleven billion, twelve million, one hundred twenty thousand, one hundred eleven".