2011111220221 has 16 divisors (see below), whose sum is σ = 2313792207360. Its totient is φ = 1735344138240.

The previous prime is 2011111220189. The next prime is 2011111220231. The reversal of 2011111220221 is 1220221111102.

It is a cyclic number.

It is not a de Polignac number, because 2011111220221 - 2⁵ = 2011111220189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011111220195 and 2011111220204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011111220231) 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, 100414996 + ... + 100435021.

It is an arithmetic number, because the mean of its divisors is an integer number (144612012960).

Almost surely, 2^{2011111220221} is an apocalyptic number.

It is an amenable number.

2011111220221 is a deficient number, since it is larger than the sum of its proper divisors (302680987139).

2011111220221 is a wasteful number, since it uses less digits than its factorization.

2011111220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200850084.

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

Adding to 2011111220221 its reverse (1220221111102), we get a palindrome (3231332331323).

The spelling of 2011111220221 in words is "two trillion, eleven billion, one hundred eleven million, two hundred twenty thousand, two hundred twenty-one".