2231240221 has 16 divisors (see below), whose sum is σ = 2636505088. Its totient is φ = 1847804400.

The previous prime is 2231240177. The next prime is 2231240233. The reversal of 2231240221 is 1220421322.

It is a cyclic number.

It is not a de Polignac number, because 2231240221 - 2¹¹ = 2231238173 is a prime.

It is a super-3 number, since 3×2231240221³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231240821) 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, 131536 + ... + 147526.

It is an arithmetic number, because the mean of its divisors is an integer number (164781568).

Almost surely, 2^2231240221 is an apocalyptic number.

It is an amenable number.

2231240221 is a deficient number, since it is larger than the sum of its proper divisors (405264867).

2231240221 is a wasteful number, since it uses less digits than its factorization.

2231240221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16672.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2231240221 is about 47236.0055572018. The cubic root of 2231240221 is about 1306.7187115345.

Adding to 2231240221 its reverse (1220421322), we get a palindrome (3451661543).

The spelling of 2231240221 in words is "two billion, two hundred thirty-one million, two hundred forty thousand, two hundred twenty-one".