2011112201221 has 4 divisors (see below), whose sum is σ = 2011804974432. Its totient is φ = 2010419428012.

The previous prime is 2011112201207. The next prime is 2011112201237. The reversal of 2011112201221 is 1221022111102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2011112201221 - 2⁹ = 2011112200709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011112201195 and 2011112201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011112201201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346382251 + ... + 346388056.

It is an arithmetic number, because the mean of its divisors is an integer number (502951243608).

Almost surely, 2^{2011112201221} is an apocalyptic number.

It is an amenable number.

2011112201221 is a deficient number, since it is larger than the sum of its proper divisors (692773211).

2011112201221 is an equidigital number, since it uses as much as digits as its factorization.

2011112201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692773210.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2011112201221 its reverse (1221022111102), we get a palindrome (3232134312323).

The spelling of 2011112201221 in words is "two trillion, eleven billion, one hundred twelve million, two hundred one thousand, two hundred twenty-one".