11211225221121 has 16 divisors (see below), whose sum is σ = 15097435616640. Its totient is φ = 7399621008000.

The previous prime is 11211225221117. The next prime is 11211225221123. The reversal of 11211225221121 is 12112252211211.

It is not a de Polignac number, because 11211225221121 - 2² = 11211225221117 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11211225221091 and 11211225221100.

It is not an unprimeable number, because it can be changed into a prime (11211225221123) 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, 3648630 + ... + 5977871.

It is an arithmetic number, because the mean of its divisors is an integer number (943589726040).

Almost surely, 2^{11211225221121} is an apocalyptic number.

It is an amenable number.

11211225221121 is a deficient number, since it is larger than the sum of its proper divisors (3886210395519).

11211225221121 is a wasteful number, since it uses less digits than its factorization.

11211225221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9630376.

The product of its digits is 320, while the sum is 24.

Adding to 11211225221121 its reverse (12112252211211), we get a palindrome (23323477432332).

The spelling of 11211225221121 in words is "eleven trillion, two hundred eleven billion, two hundred twenty-five million, two hundred twenty-one thousand, one hundred twenty-one".