2121304231 has 8 divisors (see below), whose sum is σ = 2181502800. Its totient is φ = 2061913920.

The previous prime is 2121304223. The next prime is 2121304243. The reversal of 2121304231 is 1324031212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2121304231 - 2³ = 2121304223 is a prime.

It is a super-2 number, since 2×2121304231² = 8999863280917002722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121304199 and 2121304208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121304201) 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, 196740 + ... + 207241.

It is an arithmetic number, because the mean of its divisors is an integer number (272687850).

Almost surely, 2^2121304231 is an apocalyptic number.

2121304231 is a deficient number, since it is larger than the sum of its proper divisors (60198569).

2121304231 is an equidigital number, since it uses as much as digits as its factorization.

2121304231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404129.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2121304231 is about 46057.6185988811. The cubic root of 2121304231 is about 1284.8950402544.

Adding to 2121304231 its reverse (1324031212), we get a palindrome (3445335443).

The spelling of 2121304231 in words is "two billion, one hundred twenty-one million, three hundred four thousand, two hundred thirty-one".