11212212012211 has 4 divisors (see below), whose sum is σ = 12813956585392. Its totient is φ = 9610467439032.

The previous prime is 11212212012137. The next prime is 11212212012217. The reversal of 11212212012211 is 11221021221211.

It is a happy number.

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 11212212012211 - 2¹⁹ = 11212211487923 is a prime.

It is a super-2 number, since 2×11212212012211² (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 (11212212012217) 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, 800872286580 + ... + 800872286593.

It is an arithmetic number, because the mean of its divisors is an integer number (3203489146348).

Almost surely, 2^{11212212012211} is an apocalyptic number.

11212212012211 is a deficient number, since it is larger than the sum of its proper divisors (1601744573181).

11212212012211 is an equidigital number, since it uses as much as digits as its factorization.

11212212012211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601744573180.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11212212012211 its reverse (11221021221211), we get a palindrome (22433233233422).

The spelling of 11212212012211 in words is "eleven trillion, two hundred twelve billion, two hundred twelve million, twelve thousand, two hundred eleven".