11001220022221 has 32 divisors (see below), whose sum is σ = 12950538080256. Its totient is φ = 9213220632000.

The previous prime is 11001220022209. The next prime is 11001220022239. The reversal of 11001220022221 is 12222002210011.

It is a happy number.

It is not a de Polignac number, because 11001220022221 - 2²⁹ = 11000683151309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11001220022195 and 11001220022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001220022291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 143119020 + ... + 143195866.

It is an arithmetic number, because the mean of its divisors is an integer number (404704315008).

Almost surely, 2^{11001220022221} is an apocalyptic number.

11001220022221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11001220022221 is a deficient number, since it is larger than the sum of its proper divisors (1949318058035).

11001220022221 is a wasteful number, since it uses less digits than its factorization.

11001220022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78873.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 11001220022221 its reverse (12222002210011), we get a palindrome (23223222232232).

The spelling of 11001220022221 in words is "eleven trillion, one billion, two hundred twenty million, twenty-two thousand, two hundred twenty-one".