2221120101221 has 24 divisors (see below), whose sum is σ = 2683198535040. Its totient is φ = 1800827336736.

The previous prime is 2221120101203. The next prime is 2221120101257. The reversal of 2221120101221 is 1221010211222.

It is a de Polignac number, because none of the positive numbers 2^k-2221120101221 is a prime.

It is a super-3 number, since 3×2221120101221³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2221120101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221120101121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 955715 + ... + 2314223.

It is an arithmetic number, because the mean of its divisors is an integer number (111799938960).

Almost surely, 2^{2221120101221} is an apocalyptic number.

It is an amenable number.

2221120101221 is a deficient number, since it is larger than the sum of its proper divisors (462078433819).

2221120101221 is a wasteful number, since it uses less digits than its factorization.

2221120101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1359201 (or 1359182 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2221120101221 its reverse (1221010211222), we get a palindrome (3442130312443).

The spelling of 2221120101221 in words is "two trillion, two hundred twenty-one billion, one hundred twenty million, one hundred one thousand, two hundred twenty-one".