11222001202221 has 6 divisors (see below), whose sum is σ = 16209557292110. Its totient is φ = 7481334134808.

The previous prime is 11222001202169. The next prime is 11222001202229. The reversal of 11222001202221 is 12220210022211.

It is a happy number.

11222001202221 is a `hidden beast` number, since 1 + 122 + 200 + 120 + 2 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11210369579721 + 11631622500 = 3348189^2 + 107850^2 .

It is not a de Polignac number, because 11222001202221 - 2⁹ = 11222001201709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11222001202194 and 11222001202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222001202229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 623444511226 + ... + 623444511243.

Almost surely, 2^{11222001202221} is an apocalyptic number.

It is an amenable number.

11222001202221 is a deficient number, since it is larger than the sum of its proper divisors (4987556089889).

11222001202221 is a wasteful number, since it uses less digits than its factorization.

11222001202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246889022475 (or 1246889022472 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 11222001202221 its reverse (12220210022211), we get a palindrome (23442211224432).

The spelling of 11222001202221 in words is "eleven trillion, two hundred twenty-two billion, one million, two hundred two thousand, two hundred twenty-one".