2124012321 has 8 divisors (see below), whose sum is σ = 3146684960. Its totient is φ = 1416008196.

The previous prime is 2124012311. The next prime is 2124012347. The reversal of 2124012321 is 1232104212.

It is a happy number.

It is not a de Polignac number, because 2124012321 - 2¹⁹ = 2123488033 is a prime.

It is a super-2 number, since 2×2124012321² = 9022856679519614082, 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 = 2124012294 and 2124012303.

It is not an unprimeable number, because it can be changed into a prime (2124012301) 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, 39333535 + ... + 39333588.

It is an arithmetic number, because the mean of its divisors is an integer number (393335620).

Almost surely, 2^2124012321 is an apocalyptic number.

It is an amenable number.

2124012321 is a deficient number, since it is larger than the sum of its proper divisors (1022672639).

2124012321 is an equidigital number, since it uses as much as digits as its factorization.

2124012321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78667132 (or 78667126 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2124012321 is about 46087.0081584821. The cubic root of 2124012321 is about 1285.4415800827.

Adding to 2124012321 its reverse (1232104212), we get a palindrome (3356116533).

The spelling of 2124012321 in words is "two billion, one hundred twenty-four million, twelve thousand, three hundred twenty-one".