11220202222221 has 16 divisors (see below), whose sum is σ = 15610877706240. Its totient is φ = 7154837508720.

The previous prime is 11220202222217. The next prime is 11220202222247. The reversal of 11220202222221 is 12222220202211.

It is not a de Polignac number, because 11220202222221 - 2² = 11220202222217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220202222321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6310800 + ... + 7890918.

It is an arithmetic number, because the mean of its divisors is an integer number (975679856640).

Almost surely, 2^{11220202222221} is an apocalyptic number.

It is an amenable number.

11220202222221 is a deficient number, since it is larger than the sum of its proper divisors (4390675484019).

11220202222221 is a wasteful number, since it uses less digits than its factorization.

11220202222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1683056.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 11220202222221 its reverse (12222220202211), we get a palindrome (23442422424432).

The spelling of 11220202222221 in words is "eleven trillion, two hundred twenty billion, two hundred two million, two hundred twenty-two thousand, two hundred twenty-one".