11222111220221 has 8 divisors (see below), whose sum is σ = 12449799813600. Its totient is φ = 10029005404240.

The previous prime is 11222111220169. The next prime is 11222111220227. The reversal of 11222111220221 is 12202211122211.

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 11222111220221 - 2³⁴ = 11204931351037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11222111220193 and 11222111220202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222111220227) 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, 8645693666 + ... + 8645694963.

It is an arithmetic number, because the mean of its divisors is an integer number (1556224976700).

Almost surely, 2^{11222111220221} is an apocalyptic number.

11222111220221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11222111220221 is a deficient number, since it is larger than the sum of its proper divisors (1227688593379).

11222111220221 is a wasteful number, since it uses less digits than its factorization.

11222111220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17291388699.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 11222111220221 its reverse (12202211122211), we get a palindrome (23424322342432).

It can be divided in two parts, 1122211 and 1220221, that added together give a palindrome (2342432).

The spelling of 11222111220221 in words is "eleven trillion, two hundred twenty-two billion, one hundred eleven million, two hundred twenty thousand, two hundred twenty-one".