2120434321 has 2 divisors, whose sum is σ = 2120434322. Its totient is φ = 2120434320.

The previous prime is 2120434273. The next prime is 2120434343. The reversal of 2120434321 is 1234340212.

It is an a-pointer prime, because the next prime (2120434343) can be obtained adding 2120434321 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1516012096 + 604422225 = 38936^2 + 24585^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120434321 - 2¹¹ = 2120432273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120434292 and 2120434301.

It is not a weakly prime, because it can be changed into another prime (2120438321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060217160 + 1060217161.

It is an arithmetic number, because the mean of its divisors is an integer number (1060217161).

Almost surely, 2^2120434321 is an apocalyptic number.

It is an amenable number.

2120434321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120434321 is an equidigital number, since it uses as much as digits as its factorization.

2120434321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 2120434321 is about 46048.1739160197. The cubic root of 2120434321 is about 1284.7193785315.

Adding to 2120434321 its reverse (1234340212), we get a palindrome (3354774533).

The spelling of 2120434321 in words is "two billion, one hundred twenty million, four hundred thirty-four thousand, three hundred twenty-one".