2331011221 has 16 divisors (see below), whose sum is σ = 2908200960. Its totient is φ = 1815119280.

The previous prime is 2331011203. The next prime is 2331011227. The reversal of 2331011221 is 1221101332.

It is a cyclic number.

It is not a de Polignac number, because 2331011221 - 2¹¹ = 2331009173 is a prime.

It is a super-3 number, since 3×2331011221³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 2331011195 and 2331011204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2331011227) 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, 111000 + ... + 130318.

It is an arithmetic number, because the mean of its divisors is an integer number (181762560).

Almost surely, 2^2331011221 is an apocalyptic number.

It is an amenable number.

2331011221 is a deficient number, since it is larger than the sum of its proper divisors (577189739).

2331011221 is a wasteful number, since it uses less digits than its factorization.

2331011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20904.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2331011221 is about 48280.5470246558. The cubic root of 2331011221 is about 1325.9122652683.

Adding to 2331011221 its reverse (1221101332), we get a palindrome (3552112553).

The spelling of 2331011221 in words is "two billion, three hundred thirty-one million, eleven thousand, two hundred twenty-one".