11212121012211 has 16 divisors (see below), whose sum is σ = 18983485312000. Its totient is φ = 6406926292584.

The previous prime is 11212121012171. The next prime is 11212121012219. The reversal of 11212121012211 is 11221012121211.

It is a happy number.

11212121012211 is a `hidden beast` number, since 112 + 121 + 210 + 1 + 221 + 1 = 666.

It is not a de Polignac number, because 11212121012211 - 2²⁷ = 11211986794483 is a prime.

It is a super-2 number, since 2×11212121012211² (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 (11212121012219) 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, 29661695611 + ... + 29661695988.

It is an arithmetic number, because the mean of its divisors is an integer number (1186467832000).

Almost surely, 2^{11212121012211} is an apocalyptic number.

11212121012211 is a deficient number, since it is larger than the sum of its proper divisors (7771364299789).

11212121012211 is an equidigital number, since it uses as much as digits as its factorization.

11212121012211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59323391615 (or 59323391609 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11212121012211 its reverse (11221012121211), we get a palindrome (22433133133422).

The spelling of 11212121012211 in words is "eleven trillion, two hundred twelve billion, one hundred twenty-one million, twelve thousand, two hundred eleven".