11011220111121 has 8 divisors (see below), whose sum is σ = 14700718660320. Its totient is φ = 7331267484672.

The previous prime is 11011220111057. The next prime is 11011220111123. The reversal of 11011220111121 is 12111102211011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11011220111121 - 2⁶ = 11011220111057 is a prime.

It is a super-3 number, since 3×11011220111121³ (a number of 40 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11011220111121.

It is not an unprimeable number, because it can be changed into a prime (11011220111123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2386477995 + ... + 2386482608.

It is an arithmetic number, because the mean of its divisors is an integer number (1837589832540).

Almost surely, 2^{11011220111121} is an apocalyptic number.

It is an amenable number.

11011220111121 is a deficient number, since it is larger than the sum of its proper divisors (3689498549199).

11011220111121 is an equidigital number, since it uses as much as digits as its factorization.

11011220111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4772961375.

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

Adding to 11011220111121 its reverse (12111102211011), we get a palindrome (23122322322132).

The spelling of 11011220111121 in words is "eleven trillion, eleven billion, two hundred twenty million, one hundred eleven thousand, one hundred twenty-one".