4102213243221 has 10 divisors (see below), whose sum is σ = 6127997560982. Its totient is φ = 2734808828760.

The previous prime is 4102213243199. The next prime is 4102213243253. The reversal of 4102213243221 is 1223423122014.

4102213243221 is a `hidden beast` number, since 4 + 1 + 0 + 221 + 3 + 2 + 432 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3684522479121 + 417690764100 = 1919511^2 + 646290^2 .

It is not a de Polignac number, because 4102213243221 - 2⁹ = 4102213242709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4102213243421) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 25322303890 + ... + 25322304051.

Almost surely, 2^{4102213243221} is an apocalyptic number.

It is an amenable number.

4102213243221 is a deficient number, since it is larger than the sum of its proper divisors (2025784317761).

4102213243221 is an equidigital number, since it uses as much as digits as its factorization.

4102213243221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50644607953 (or 50644607944 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 4102213243221 its reverse (1223423122014), we get a palindrome (5325636365235).

It can be divided in two parts, 4102213 and 243221, that added together give a palindrome (4345434).

The spelling of 4102213243221 in words is "four trillion, one hundred two billion, two hundred thirteen million, two hundred forty-three thousand, two hundred twenty-one".