2231221102221 has 16 divisors (see below), whose sum is σ = 3083396729600. Its totient is φ = 1434000760128.

The previous prime is 2231221102219. The next prime is 2231221102247. The reversal of 2231221102221 is 1222011221322.

It is not a de Polignac number, because 2231221102221 - 2¹ = 2231221102219 is a prime.

It is a super-3 number, since 3×2231221102221³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231221102211) 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, 92194741 + ... + 92218938.

It is an arithmetic number, because the mean of its divisors is an integer number (192712295600).

Almost surely, 2^{2231221102221} is an apocalyptic number.

It is an amenable number.

2231221102221 is a deficient number, since it is larger than the sum of its proper divisors (852175627379).

2231221102221 is a wasteful number, since it uses less digits than its factorization.

2231221102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184413828.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 2231221102221 its reverse (1222011221322), we get a palindrome (3453232323543).

The spelling of 2231221102221 in words is "two trillion, two hundred thirty-one billion, two hundred twenty-one million, one hundred two thousand, two hundred twenty-one".