11211212110121 has 16 divisors (see below), whose sum is σ = 11419396070208. Its totient is φ = 11003824728000.

The previous prime is 11211212110061. The next prime is 11211212110127. The reversal of 11211212110121 is 12101121211211.

It is a cyclic number.

It is not a de Polignac number, because 11211212110121 - 2³⁸ = 10936334203177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11211212110121.

It is not an unprimeable number, because it can be changed into a prime (11211212110127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148343075 + ... + 148418631.

It is an arithmetic number, because the mean of its divisors is an integer number (713712254388).

Almost surely, 2^{11211212110121} is an apocalyptic number.

It is an amenable number.

11211212110121 is a deficient number, since it is larger than the sum of its proper divisors (208183960087).

11211212110121 is an equidigital number, since it uses as much as digits as its factorization.

11211212110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80792.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11211212110121 its reverse (12101121211211), we get a palindrome (23312333321332).

The spelling of 11211212110121 in words is "eleven trillion, two hundred eleven billion, two hundred twelve million, one hundred ten thousand, one hundred twenty-one".