4033240451021 has 2 divisors, whose sum is σ = 4033240451022. Its totient is φ = 4033240451020.

The previous prime is 4033240451011. The next prime is 4033240451039. The reversal of 4033240451021 is 1201540423304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3832926021796 + 200314429225 = 1957786^2 + 447565^2 .

It is a cyclic number.

It is not a de Polignac number, because 4033240451021 - 2¹⁴ = 4033240434637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4033240451011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2016620225510 + 2016620225511.

It is an arithmetic number, because the mean of its divisors is an integer number (2016620225511).

Almost surely, 2^{4033240451021} is an apocalyptic number.

It is an amenable number.

4033240451021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4033240451021 is an equidigital number, since it uses as much as digits as its factorization.

4033240451021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 4033240451021 its reverse (1201540423304), we get a palindrome (5234780874325).

The spelling of 4033240451021 in words is "four trillion, thirty-three billion, two hundred forty million, four hundred fifty-one thousand, twenty-one".