11212121210011 has 32 divisors (see below), whose sum is σ = 11669001429888. Its totient is φ = 10768119828480.

The previous prime is 11212121209999. The next prime is 11212121210021. The reversal of 11212121210011 is 11001212121211.

It is a cyclic number.

It is not a de Polignac number, because 11212121210011 - 2⁵ = 11212121209979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11212121210021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139843911 + ... + 139924063.

It is an arithmetic number, because the mean of its divisors is an integer number (364656294684).

Almost surely, 2^{11212121210011} is an apocalyptic number.

11212121210011 is a deficient number, since it is larger than the sum of its proper divisors (456880219877).

11212121210011 is a wasteful number, since it uses less digits than its factorization.

11212121210011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80631.

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

Adding to 11212121210011 its reverse (11001212121211), we get a palindrome (22213333331222).

The spelling of 11212121210011 in words is "eleven trillion, two hundred twelve billion, one hundred twenty-one million, two hundred ten thousand, eleven".