11211212101121 has 16 divisors (see below), whose sum is σ = 11308954288128. Its totient is φ = 11113936938000.

The previous prime is 11211212101087. The next prime is 11211212101123. The reversal of 11211212101121 is 12110121211211.

It is a cyclic number.

It is not a de Polignac number, because 11211212101121 - 2³⁰ = 11210138359297 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 11211212101121.

It is not an unprimeable number, because it can be changed into a prime (11211212101123) 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, 117857240 + ... + 117952326.

It is an arithmetic number, because the mean of its divisors is an integer number (706809643008).

Almost surely, 2^{11211212101121} is an apocalyptic number.

It is an amenable number.

11211212101121 is a deficient number, since it is larger than the sum of its proper divisors (97742187007).

11211212101121 is a wasteful number, since it uses less digits than its factorization.

11211212101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97532.

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

Adding to 11211212101121 its reverse (12110121211211), we get a palindrome (23321333312332).

The spelling of 11211212101121 in words is "eleven trillion, two hundred eleven billion, two hundred twelve million, one hundred one thousand, one hundred twenty-one".