4233421010521 has 2 divisors, whose sum is σ = 4233421010522. Its totient is φ = 4233421010520.

The previous prime is 4233421010473. The next prime is 4233421010551. The reversal of 4233421010521 is 1250101243324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4036583265625 + 196837744896 = 2009125^2 + 443664^2 .

It is a cyclic number.

It is not a de Polignac number, because 4233421010521 - 2⁷ = 4233421010393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4233421010521.

It is not a weakly prime, because it can be changed into another prime (4233421010551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2116710505260 + 2116710505261.

It is an arithmetic number, because the mean of its divisors is an integer number (2116710505261).

Almost surely, 2^{4233421010521} is an apocalyptic number.

It is an amenable number.

4233421010521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4233421010521 is an equidigital number, since it uses as much as digits as its factorization.

4233421010521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 4233421010521 its reverse (1250101243324), we get a palindrome (5483522253845).

The spelling of 4233421010521 in words is "four trillion, two hundred thirty-three billion, four hundred twenty-one million, ten thousand, five hundred twenty-one".