11212012211 has 4 divisors (see below), whose sum is σ = 11311233672. Its totient is φ = 11112790752.

The previous prime is 11212012199. The next prime is 11212012223. The reversal of 11212012211 is 11221021211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11221021211 = 10729 ⋅1045859.

It is an interprime number because it is at equal distance from previous prime (11212012199) and next prime (11212012223).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11212012211 is a prime.

It is a super-2 number, since 2×11212012211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11212014211) 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, 49610561 + ... + 49610786.

It is an arithmetic number, because the mean of its divisors is an integer number (2827808418).

Almost surely, 2^11212012211 is an apocalyptic number.

11212012211 is a deficient number, since it is larger than the sum of its proper divisors (99221461).

11212012211 is an equidigital number, since it uses as much as digits as its factorization.

11212012211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99221460.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11212012211 its reverse (11221021211), we get a palindrome (22433033422).

The spelling of 11212012211 in words is "eleven billion, two hundred twelve million, twelve thousand, two hundred eleven".