11212112222211 has 4 divisors (see below), whose sum is σ = 14949482962952. Its totient is φ = 7474741481472.

The previous prime is 11212112222209. The next prime is 11212112222239. The reversal of 11212112222211 is 11222221121211.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11212112222211 - 2¹ = 11212112222209 is a prime.

It is a super-2 number, since 2×11212112222211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11212112222291) 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, 1868685370366 + ... + 1868685370371.

It is an arithmetic number, because the mean of its divisors is an integer number (3737370740738).

Almost surely, 2^{11212112222211} is an apocalyptic number.

11212112222211 is a deficient number, since it is larger than the sum of its proper divisors (3737370740741).

11212112222211 is an equidigital number, since it uses as much as digits as its factorization.

11212112222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3737370740740.

The product of its digits is 128, while the sum is 21.

Adding to 11212112222211 its reverse (11222221121211), we get a palindrome (22434333343422).

The spelling of 11212112222211 in words is "eleven trillion, two hundred twelve billion, one hundred twelve million, two hundred twenty-two thousand, two hundred eleven".