2211123201221 has 8 divisors (see below), whose sum is σ = 2412568071264. Its totient is φ = 2009750609520.

The previous prime is 2211123201197. The next prime is 2211123201239. The reversal of 2211123201221 is 1221023211122.

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

It is a cyclic number.

It is not a de Polignac number, because 2211123201221 - 2³⁴ = 2193943332037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211123201193 and 2211123201202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211123201281) 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, 18005606 + ... + 18127991.

It is an arithmetic number, because the mean of its divisors is an integer number (301571008908).

Almost surely, 2^{2211123201221} is an apocalyptic number.

It is an amenable number.

2211123201221 is a deficient number, since it is larger than the sum of its proper divisors (201444870043).

2211123201221 is a wasteful number, since it uses less digits than its factorization.

2211123201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36139171.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 2211123201221 its reverse (1221023211122), we get a palindrome (3432146412343).

Subtracting from 2211123201221 its reverse (1221023211122), we obtain a palindrome (990099990099).

The spelling of 2211123201221 in words is "two trillion, two hundred eleven billion, one hundred twenty-three million, two hundred one thousand, two hundred twenty-one".