2123323421 has 8 divisors (see below), whose sum is σ = 2210536920. Its totient is φ = 2037043008.

The previous prime is 2123323417. The next prime is 2123323427. The reversal of 2123323421 is 1243233212.

It can be written as a sum of positive squares in 4 ways, for example, as 432057796 + 1691265625 = 20786^2 + 41125^2 .

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 2123323421 - 2² = 2123323417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123323427) 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, 228626 + ... + 237731.

It is an arithmetic number, because the mean of its divisors is an integer number (276317115).

Almost surely, 2^2123323421 is an apocalyptic number.

It is an amenable number.

2123323421 is a deficient number, since it is larger than the sum of its proper divisors (87213499).

2123323421 is a wasteful number, since it uses less digits than its factorization.

2123323421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466543.

The product of its digits is 1728, while the sum is 23.

The square root of 2123323421 is about 46079.5336456436. The cubic root of 2123323421 is about 1285.3025921161.

Adding to 2123323421 its reverse (1243233212), we get a palindrome (3366556633).

The spelling of 2123323421 in words is "two billion, one hundred twenty-three million, three hundred twenty-three thousand, four hundred twenty-one".