2011201112221 has 4 divisors (see below), whose sum is σ = 2298515556832. Its totient is φ = 1723886667612.

The previous prime is 2011201112197. The next prime is 2011201112251. The reversal of 2011201112221 is 1222111021102.

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 2011201112221 - 2⁷ = 2011201112093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011201112195 and 2011201112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011201112251) 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, 143657222295 + ... + 143657222308.

It is an arithmetic number, because the mean of its divisors is an integer number (574628889208).

Almost surely, 2^{2011201112221} is an apocalyptic number.

It is an amenable number.

2011201112221 is a deficient number, since it is larger than the sum of its proper divisors (287314444611).

2011201112221 is an equidigital number, since it uses as much as digits as its factorization.

2011201112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287314444610.

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

Adding to 2011201112221 its reverse (1222111021102), we get a palindrome (3233312133323).

The spelling of 2011201112221 in words is "two trillion, eleven billion, two hundred one million, one hundred twelve thousand, two hundred twenty-one".