2221200100021 has 32 divisors (see below), whose sum is σ = 2750703183360. Its totient is φ = 1750446028800.

The previous prime is 2221200099971. The next prime is 2221200100027. The reversal of 2221200100021 is 1200010021222.

It is a happy number.

2221200100021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2221200100021 - 2¹¹ = 2221200097973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221200099974 and 2221200100010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221200100027) 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, 285000 + ... + 2126881.

It is an arithmetic number, because the mean of its divisors is an integer number (85959474480).

Almost surely, 2^{2221200100021} is an apocalyptic number.

It is an amenable number.

2221200100021 is a deficient number, since it is larger than the sum of its proper divisors (529503083339).

2221200100021 is a wasteful number, since it uses less digits than its factorization.

2221200100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2412085.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2221200100021 its reverse (1200010021222), we get a palindrome (3421210121243).

The spelling of 2221200100021 in words is "two trillion, two hundred twenty-one billion, two hundred million, one hundred thousand, twenty-one".