2120210321 has 8 divisors (see below), whose sum is σ = 2152479144. Its totient is φ = 2088028800.

The previous prime is 2120210291. The next prime is 2120210359. The reversal of 2120210321 is 1230120212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1361979025 + 758231296 = 36905^2 + 27536^2 .

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 2120210321 - 2¹⁴ = 2120193937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2120210296 and 2120210305.

It is not an unprimeable number, because it can be changed into a prime (2120210381) 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, 27971 + ... + 70871.

It is an arithmetic number, because the mean of its divisors is an integer number (269059893).

Almost surely, 2^2120210321 is an apocalyptic number.

It is an amenable number.

2120210321 is a deficient number, since it is larger than the sum of its proper divisors (32268823).

2120210321 is an equidigital number, since it uses as much as digits as its factorization.

2120210321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43651.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2120210321 is about 46045.7416163536. The cubic root of 2120210321 is about 1284.6741382283.

Adding to 2120210321 its reverse (1230120212), we get a palindrome (3350330533).

The spelling of 2120210321 in words is "two billion, one hundred twenty million, two hundred ten thousand, three hundred twenty-one".