2011221110221 has 8 divisors (see below), whose sum is σ = 2022848263800. Its totient is φ = 1999599621120.

The previous prime is 2011221110209. The next prime is 2011221110303. The reversal of 2011221110221 is 1220111221102.

It can be written as a sum of positive squares in 4 ways, for example, as 4071716100 + 2007149394121 = 63810^2 + 1416739^2 .

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 2011221110221 - 2¹⁷ = 2011220979149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011221110195 and 2011221110204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011221110021) 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, 702916 + ... + 2125213.

It is an arithmetic number, because the mean of its divisors is an integer number (252856032975).

Almost surely, 2^{2011221110221} is an apocalyptic number.

It is an amenable number.

2011221110221 is a deficient number, since it is larger than the sum of its proper divisors (11627153579).

2011221110221 is a wasteful number, since it uses less digits than its factorization.

2011221110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2832239.

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

Adding to 2011221110221 its reverse (1220111221102), we get a palindrome (3231332331323).

The spelling of 2011221110221 in words is "two trillion, eleven billion, two hundred twenty-one million, one hundred ten thousand, two hundred twenty-one".