3522002520221 has 4 divisors (see below), whose sum is σ = 3522546633372. Its totient is φ = 3521458407072.

The previous prime is 3522002520199. The next prime is 3522002520227. The reversal of 3522002520221 is 1220252002253.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1175621916121 + 2346380604100 = 1084261^2 + 1531790^2 .

It is a cyclic number.

It is not a de Polignac number, because 3522002520221 - 2¹⁰ = 3522002519197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3522002520227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272046866 + ... + 272059811.

It is an arithmetic number, because the mean of its divisors is an integer number (880636658343).

Almost surely, 2^{3522002520221} is an apocalyptic number.

It is an amenable number.

3522002520221 is a deficient number, since it is larger than the sum of its proper divisors (544113151).

3522002520221 is an equidigital number, since it uses as much as digits as its factorization.

3522002520221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544113150.

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 3522002520221 its reverse (1220252002253), we get a palindrome (4742254522474).

The spelling of 3522002520221 in words is "three trillion, five hundred twenty-two billion, two million, five hundred twenty thousand, two hundred twenty-one".