3521051201221 has 8 divisors (see below), whose sum is σ = 3580874216640. Its totient is φ = 3461232991968.

The previous prime is 3521051201219. The next prime is 3521051201237. The reversal of 3521051201221 is 1221021501253.

It is a happy number.

3521051201221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3521051201221 - 2¹ = 3521051201219 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 (3521051201621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291760 + ... + 2669686.

It is an arithmetic number, because the mean of its divisors is an integer number (447609277080).

Almost surely, 2^{3521051201221} is an apocalyptic number.

It is an amenable number.

3521051201221 is a deficient number, since it is larger than the sum of its proper divisors (59823015419).

3521051201221 is a wasteful number, since it uses less digits than its factorization.

3521051201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403083.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 3521051201221 its reverse (1221021501253), we get a palindrome (4742072702474).

The spelling of 3521051201221 in words is "three trillion, five hundred twenty-one billion, fifty-one million, two hundred one thousand, two hundred twenty-one".