2231100332221 has 4 divisors (see below), whose sum is σ = 2362341528252. Its totient is φ = 2099859136192.

The previous prime is 2231100332173. The next prime is 2231100332273. The reversal of 2231100332221 is 1222330011322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1802343840196 + 428756492025 = 1342514^2 + 654795^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231100332221 - 2⁹ = 2231100331709 is a prime.

It is a super-3 number, since 3×2231100332221³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2231100332192 and 2231100332201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231100332821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65620597990 + ... + 65620598023.

It is an arithmetic number, because the mean of its divisors is an integer number (590585382063).

Almost surely, 2^{2231100332221} is an apocalyptic number.

It is an amenable number.

2231100332221 is a deficient number, since it is larger than the sum of its proper divisors (131241196031).

2231100332221 is a wasteful number, since it uses less digits than its factorization.

2231100332221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131241196030.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 2231100332221 its reverse (1222330011322), we get a palindrome (3453430343543).

The spelling of 2231100332221 in words is "two trillion, two hundred thirty-one billion, one hundred million, three hundred thirty-two thousand, two hundred twenty-one".