2011111200221 has 8 divisors (see below), whose sum is σ = 2013609907320. Its totient is φ = 2008613956608.

The previous prime is 2011111200211. The next prime is 2011111200253. The reversal of 2011111200221 is 1220021111102.

It can be written as a sum of positive squares in 4 ways, for example, as 1049948608900 + 961162591321 = 1024670^2 + 980389^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011111200221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011111200196 and 2011111200205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011111200211) 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, 2397155 + ... + 3125471.

It is an arithmetic number, because the mean of its divisors is an integer number (251701238415).

Almost surely, 2^{2011111200221} is an apocalyptic number.

It is an amenable number.

2011111200221 is a deficient number, since it is larger than the sum of its proper divisors (2498707099).

2011111200221 is a wasteful number, since it uses less digits than its factorization.

2011111200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731743.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2011111200221 its reverse (1220021111102), we get a palindrome (3231132311323).

The spelling of 2011111200221 in words is "two trillion, eleven billion, one hundred eleven million, two hundred thousand, two hundred twenty-one".