11112211021121 has 16 divisors (see below), whose sum is σ = 12730287897600. Its totient is φ = 9501801519168.

The previous prime is 11112211021097. The next prime is 11112211021123. The reversal of 11112211021121 is 12112011221111.

11112211021121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11112211021121 - 2¹⁸ = 11112210758977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11112211021121.

It is not an unprimeable number, because it can be changed into a prime (11112211021123) 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, 9891491 + ... + 10957463.

It is an arithmetic number, because the mean of its divisors is an integer number (795642993600).

Almost surely, 2^{11112211021121} is an apocalyptic number.

It is an amenable number.

11112211021121 is a deficient number, since it is larger than the sum of its proper divisors (1618076876479).

11112211021121 is a wasteful number, since it uses less digits than its factorization.

11112211021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069568.

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

Adding to 11112211021121 its reverse (12112011221111), we get a palindrome (23224222242232).

The spelling of 11112211021121 in words is "eleven trillion, one hundred twelve billion, two hundred eleven million, twenty-one thousand, one hundred twenty-one".