4233541021 has 2 divisors, whose sum is σ = 4233541022. Its totient is φ = 4233541020.

The previous prime is 4233541019. The next prime is 4233541043. The reversal of 4233541021 is 1201453324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4011828921 + 221712100 = 63339^2 + 14890^2 .

It is a cyclic number.

It is not a de Polignac number, because 4233541021 - 2¹ = 4233541019 is a prime.

Together with 4233541019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4233541001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2116770510 + 2116770511.

It is an arithmetic number, because the mean of its divisors is an integer number (2116770511).

Almost surely, 2^4233541021 is an apocalyptic number.

It is an amenable number.

4233541021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4233541021 is an equidigital number, since it uses as much as digits as its factorization.

4233541021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 4233541021 is about 65065.6669911252. Note that the first 3 decimals coincide. The cubic root of 4233541021 is about 1617.7121875881.

Adding to 4233541021 its reverse (1201453324), we get a palindrome (5434994345).

The spelling of 4233541021 in words is "four billion, two hundred thirty-three million, five hundred forty-one thousand, twenty-one".