11222111202221 has 8 divisors (see below), whose sum is σ = 11242823136480. Its totient is φ = 11201407599888.

The previous prime is 11222111202143. The next prime is 11222111202227. The reversal of 11222111202221 is 12220211122211.

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 11222111202221 - 2¹⁴ = 11222111185837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11222111202193 and 11222111202202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222111202227) 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, 616490 + ... + 4777476.

It is an arithmetic number, because the mean of its divisors is an integer number (1405352892060).

Almost surely, 2^{11222111202221} is an apocalyptic number.

It is an amenable number.

11222111202221 is a deficient number, since it is larger than the sum of its proper divisors (20711934259).

11222111202221 is an equidigital number, since it uses as much as digits as its factorization.

11222111202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4165963.

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

Adding to 11222111202221 its reverse (12220211122211), we get a palindrome (23442322324432).

The spelling of 11222111202221 in words is "eleven trillion, two hundred twenty-two billion, one hundred eleven million, two hundred two thousand, two hundred twenty-one".