11221200000021 has 32 divisors (see below), whose sum is σ = 16589783293056. Its totient is φ = 6689051136000.

The previous prime is 11221200000007. The next prime is 11221200000067. The reversal of 11221200000021 is 12000000212211.

It is not a de Polignac number, because 11221200000021 - 2⁹ = 11221199999509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11221199999952 and 11221200000006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221200000221) 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, 108410725 + ... + 108514181.

It is an arithmetic number, because the mean of its divisors is an integer number (518430727908).

Almost surely, 2^{11221200000021} is an apocalyptic number.

11221200000021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11221200000021 is a deficient number, since it is larger than the sum of its proper divisors (5368583293035).

11221200000021 is a wasteful number, since it uses less digits than its factorization.

11221200000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157413.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 11221200000021 its reverse (12000000212211), we get a palindrome (23221200212232).

The spelling of 11221200000021 in words is "eleven trillion, two hundred twenty-one billion, two hundred million, twenty-one", and thus it is an aban number.