3530221213121 has 32 divisors (see below), whose sum is σ = 3668076720000. Its totient is φ = 3395249561088.

The previous prime is 3530221213087. The next prime is 3530221213147. The reversal of 3530221213121 is 1213121220353.

It is a cyclic number.

It is not a de Polignac number, because 3530221213121 - 2¹⁰ = 3530221212097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3530221213721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1620109610 + ... + 1620111788.

It is an arithmetic number, because the mean of its divisors is an integer number (114627397500).

Almost surely, 2^{3530221213121} is an apocalyptic number.

It is an amenable number.

3530221213121 is a deficient number, since it is larger than the sum of its proper divisors (137855506879).

3530221213121 is a wasteful number, since it uses less digits than its factorization.

3530221213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3873.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 3530221213121 its reverse (1213121220353), we get a palindrome (4743342433474).

The spelling of 3530221213121 in words is "three trillion, five hundred thirty billion, two hundred twenty-one million, two hundred thirteen thousand, one hundred twenty-one".