211122001111 has 16 divisors (see below), whose sum is σ = 257460563200. Its totient is φ = 169088948928.

The previous prime is 211122001091. The next prime is 211122001229. The reversal of 211122001111 is 111100221112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 211122001111 - 2⁷ = 211122000983 is a prime.

It is a super-2 number, since 2×211122001111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211122001091 and 211122001100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211122001411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10862781 + ... + 10882198.

It is an arithmetic number, because the mean of its divisors is an integer number (16091285200).

Almost surely, 2^211122001111 is an apocalyptic number.

211122001111 is a deficient number, since it is larger than the sum of its proper divisors (46338562089).

211122001111 is a wasteful number, since it uses less digits than its factorization.

211122001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21745078.

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

Adding to 211122001111 its reverse (111100221112), we get a palindrome (322222222223).

The spelling of 211122001111 in words is "two hundred eleven billion, one hundred twenty-two million, one thousand, one hundred eleven".