221412442435221 has 16 divisors (see below), whose sum is σ = 310762823541440. Its totient is φ = 139835604061440.

The previous prime is 221412442435213. The next prime is 221412442435237. The reversal of 221412442435221 is 122534244214122.

It is not a de Polignac number, because 221412442435221 - 2³ = 221412442435213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221412442435221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221412442435321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51141460 + ... + 55301661.

It is an arithmetic number, because the mean of its divisors is an integer number (19422676471340).

Almost surely, 2^{221412442435221} is an apocalyptic number.

It is an amenable number.

221412442435221 is a deficient number, since it is larger than the sum of its proper divisors (89350381106219).

221412442435221 is a wasteful number, since it uses less digits than its factorization.

221412442435221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106479636.

The product of its digits is 245760, while the sum is 39.

Adding to 221412442435221 its reverse (122534244214122), we get a palindrome (343946686649343).

The spelling of 221412442435221 in words is "two hundred twenty-one trillion, four hundred twelve billion, four hundred forty-two million, four hundred thirty-five thousand, two hundred twenty-one".