2211321110121 has 12 divisors (see below), whose sum is σ = 3199865024772. Its totient is φ = 1471567366176.

The previous prime is 2211321110099. The next prime is 2211321110161. The reversal of 2211321110121 is 1210111231122.

It is a happy number.

2211321110121 is a `hidden beast` number, since 2 + 211 + 321 + 1 + 10 + 121 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 648661106025 + 1562660004096 = 805395^2 + 1250064^2 .

It is not a de Polignac number, because 2211321110121 - 2⁶ = 2211321110057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2211321110094 and 2211321110103.

It is not an unprimeable number, because it can be changed into a prime (2211321110161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 220553646 + ... + 220563671.

It is an arithmetic number, because the mean of its divisors is an integer number (266655418731).

Almost surely, 2^{2211321110121} is an apocalyptic number.

It is an amenable number.

2211321110121 is a deficient number, since it is larger than the sum of its proper divisors (988543914651).

2211321110121 is a wasteful number, since it uses less digits than its factorization.

2211321110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441117880 (or 441117877 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 2211321110121 its reverse (1210111231122), we get a palindrome (3421432341243).

The spelling of 2211321110121 in words is "two trillion, two hundred eleven billion, three hundred twenty-one million, one hundred ten thousand, one hundred twenty-one".