11111122010221 has 8 divisors (see below), whose sum is σ = 11137653412704. Its totient is φ = 11084591268240.

The previous prime is 11111122010167. The next prime is 11111122010281. The reversal of 11111122010221 is 12201022111111.

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 11111122010221 - 2³⁹ = 10561366196333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11111122010195 and 11111122010204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111122010281) 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, 57389646 + ... + 57582928.

It is an arithmetic number, because the mean of its divisors is an integer number (1392206676588).

Almost surely, 2^{11111122010221} is an apocalyptic number.

It is an amenable number.

11111122010221 is a deficient number, since it is larger than the sum of its proper divisors (26531402483).

11111122010221 is a wasteful number, since it uses less digits than its factorization.

11111122010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330251.

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

Adding to 11111122010221 its reverse (12201022111111), we get a palindrome (23312144121332).

It can be divided in two parts, 11111 and 122010221, that multiplied together give a palindrome (1355655565531).

The spelling of 11111122010221 in words is "eleven trillion, one hundred eleven billion, one hundred twenty-two million, ten thousand, two hundred twenty-one".