2231001321 has 16 divisors (see below), whose sum is σ = 3084741504. Its totient is φ = 1433078784.

The previous prime is 2231001277. The next prime is 2231001361. The reversal of 2231001321 is 1231001322.

It is not a de Polignac number, because 2231001321 - 2¹⁷ = 2230870249 is a prime.

It is a super-3 number, since 3×2231001321³ (a number of 29 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2231001321.

It is not an unprimeable number, because it can be changed into a prime (2231001361) 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, 86136 + ... + 109001.

It is an arithmetic number, because the mean of its divisors is an integer number (192796344).

Almost surely, 2^2231001321 is an apocalyptic number.

It is an amenable number.

2231001321 is a deficient number, since it is larger than the sum of its proper divisors (853740183).

2231001321 is a wasteful number, since it uses less digits than its factorization.

2231001321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195280.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2231001321 is about 47233.4766982063. The cubic root of 2231001321 is about 1306.6720728625.

Adding to 2231001321 its reverse (1231001322), we get a palindrome (3462002643).

Subtracting from 2231001321 its reverse (1231001322), we obtain a palindrome (999999999).

It can be divided in two parts, 2231001 and 321, that added together give a palindrome (2231322).

The spelling of 2231001321 in words is "two billion, two hundred thirty-one million, one thousand, three hundred twenty-one".