11112111022211 has 4 divisors (see below), whose sum is σ = 11114937816024. Its totient is φ = 11109284228400.

The previous prime is 11112111022189. The next prime is 11112111022213. The reversal of 11112111022211 is 11222011121111.

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 11112111022211 - 2²² = 11112106827907 is a prime.

It is a super-2 number, since 2×11112111022211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11112111022211.

It is not an unprimeable number, because it can be changed into a prime (11112111022213) 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, 1413391010 + ... + 1413398871.

It is an arithmetic number, because the mean of its divisors is an integer number (2778734454006).

Almost surely, 2^{11112111022211} is an apocalyptic number.

11112111022211 is a deficient number, since it is larger than the sum of its proper divisors (2826793813).

11112111022211 is an equidigital number, since it uses as much as digits as its factorization.

11112111022211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2826793812.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11112111022211 its reverse (11222011121111), we get a palindrome (22334122143322).

The spelling of 11112111022211 in words is "eleven trillion, one hundred twelve billion, one hundred eleven million, twenty-two thousand, two hundred eleven".