221322130021 has 8 divisors (see below), whose sum is σ = 235777540320. Its totient is φ = 207147407472.

The previous prime is 221322129989. The next prime is 221322130031. The reversal of 221322130021 is 120031223122.

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 221322130021 - 2⁵ = 221322129989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221322130031) 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, 70170310 + ... + 70173463.

It is an arithmetic number, because the mean of its divisors is an integer number (29472192540).

Almost surely, 2^221322130021 is an apocalyptic number.

It is an amenable number.

221322130021 is a deficient number, since it is larger than the sum of its proper divisors (14455410299).

221322130021 is a wasteful number, since it uses less digits than its factorization.

221322130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140343875.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 221322130021 its reverse (120031223122), we get a palindrome (341353353143).

The spelling of 221322130021 in words is "two hundred twenty-one billion, three hundred twenty-two million, one hundred thirty thousand, twenty-one".