2231213321 has 8 divisors (see below), whose sum is σ = 2255724288. Its totient is φ = 2206750000.

The previous prime is 2231213267. The next prime is 2231213329. The reversal of 2231213321 is 1233121322.

2231213321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2231213321 is a prime.

It is a super-3 number, since 3×2231213321³ (a number of 29 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 = 2231213293 and 2231213302.

It is not an unprimeable number, because it can be changed into a prime (2231213329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86696 + ... + 109446.

It is an arithmetic number, because the mean of its divisors is an integer number (281965536).

Almost surely, 2^2231213321 is an apocalyptic number.

It is an amenable number.

2231213321 is a deficient number, since it is larger than the sum of its proper divisors (24510967).

2231213321 is a wasteful number, since it uses less digits than its factorization.

2231213321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23823.

The product of its digits is 432, while the sum is 20.

The square root of 2231213321 is about 47235.7208159249. The cubic root of 2231213321 is about 1306.7134602137.

Adding to 2231213321 its reverse (1233121322), we get a palindrome (3464334643).

The spelling of 2231213321 in words is "two billion, two hundred thirty-one million, two hundred thirteen thousand, three hundred twenty-one".