2123442321 has 128 divisors (see below), whose sum is σ = 4044902400. Its totient is φ = 955100160.

The previous prime is 2123442313. The next prime is 2123442331. The reversal of 2123442321 is 1232443212.

It is a happy number.

It is not a de Polignac number, because 2123442321 - 2³ = 2123442313 is a prime.

It is a super-2 number, since 2×2123442321² = 9018014581227734082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2123442291 and 2123442300.

It is not an unprimeable number, because it can be changed into a prime (2123442301) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3221890 + ... + 3222548.

It is an arithmetic number, because the mean of its divisors is an integer number (31600800).

Almost surely, 2^2123442321 is an apocalyptic number.

2123442321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2123442321 is a deficient number, since it is larger than the sum of its proper divisors (1921460079).

2123442321 is a wasteful number, since it uses less digits than its factorization.

2123442321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759.

The product of its digits is 2304, while the sum is 24.

The square root of 2123442321 is about 46080.8237882093. The cubic root of 2123442321 is about 1285.3265827502.

Adding to 2123442321 its reverse (1232443212), we get a palindrome (3355885533).

It can be divided in two parts, 2123 and 442321, that added together give a palindrome (444444).

The spelling of 2123442321 in words is "two billion, one hundred twenty-three million, four hundred forty-two thousand, three hundred twenty-one".