11222221220221 has 8 divisors (see below), whose sum is σ = 12962565687744. Its totient is φ = 9601900509120.

The previous prime is 11222221220213. The next prime is 11222221220257. The reversal of 11222221220221 is 12202212222211.

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 11222221220221 - 2³ = 11222221220213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11222221220192 and 11222221220201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222221220281) 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, 30005938905 + ... + 30005939278.

It is an arithmetic number, because the mean of its divisors is an integer number (1620320710968).

Almost surely, 2^{11222221220221} is an apocalyptic number.

11222221220221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11222221220221 is a deficient number, since it is larger than the sum of its proper divisors (1740344467523).

11222221220221 is a wasteful number, since it uses less digits than its factorization.

11222221220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60011878211.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 11222221220221 its reverse (12202212222211), we get a palindrome (23424433442432).

The spelling of 11222221220221 in words is "eleven trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred twenty thousand, two hundred twenty-one".