11211210011121 has 16 divisors (see below), whose sum is σ = 15599827086336. Its totient is φ = 7148434048976.

The previous prime is 11211210011107. The next prime is 11211210011129. The reversal of 11211210011121 is 12111001211211.

It is a cyclic number.

It is not a de Polignac number, because 11211210011121 - 2¹¹ = 11211210009073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11211210011121.

It is not an unprimeable number, because it can be changed into a prime (11211210011129) 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, 7778355 + ... + 9106328.

It is an arithmetic number, because the mean of its divisors is an integer number (974989192896).

Almost surely, 2^{11211210011121} is an apocalyptic number.

It is an amenable number.

11211210011121 is a deficient number, since it is larger than the sum of its proper divisors (4388617075215).

11211210011121 is a wasteful number, since it uses less digits than its factorization.

11211210011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16894332.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 11211210011121 its reverse (12111001211211), we get a palindrome (23322211222332).

The spelling of 11211210011121 in words is "eleven trillion, two hundred eleven billion, two hundred ten million, eleven thousand, one hundred twenty-one".