11221110021 has 64 divisors (see below), whose sum is σ = 17568866304. Its totient is φ = 6305644800.

The previous prime is 11221110007. The next prime is 11221110031. The reversal of 11221110021 is 12001112211.

It is not a de Polignac number, because 11221110021 - 2⁶ = 11221109957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11221109979 and 11221110006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221110001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2329011 + ... + 2333823.

It is an arithmetic number, because the mean of its divisors is an integer number (274513536).

Almost surely, 2^11221110021 is an apocalyptic number.

11221110021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11221110021 is a deficient number, since it is larger than the sum of its proper divisors (6347756283).

11221110021 is a wasteful number, since it uses less digits than its factorization.

11221110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4954.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11221110021 its reverse (12001112211), we get a palindrome (23222222232).

The spelling of 11221110021 in words is "eleven billion, two hundred twenty-one million, one hundred ten thousand, twenty-one".