2221100201221 has 16 divisors (see below), whose sum is σ = 2565620524800. Its totient is φ = 1900353530880.

The previous prime is 2221100201129. The next prime is 2221100201233. The reversal of 2221100201221 is 1221020011222.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2221100201221 - 2⁷ = 2221100201093 is a prime.

It is a super-2 number, since 2×2221100201221² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2221100201195 and 2221100201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221100201261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7493380 + ... + 7784146.

It is an arithmetic number, because the mean of its divisors is an integer number (160351282800).

Almost surely, 2^{2221100201221} is an apocalyptic number.

It is an amenable number.

2221100201221 is a deficient number, since it is larger than the sum of its proper divisors (344520323579).

2221100201221 is a wasteful number, since it uses less digits than its factorization.

2221100201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331644.

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

Adding to 2221100201221 its reverse (1221020011222), we get a palindrome (3442120212443).

The spelling of 2221100201221 in words is "two trillion, two hundred twenty-one billion, one hundred million, two hundred one thousand, two hundred twenty-one".