221210201021 has 8 divisors (see below), whose sum is σ = 242976880320. Its totient is φ = 200455925472.

The previous prime is 221210200999. The next prime is 221210201029. The reversal of 221210201021 is 120102012122.

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 221210201021 - 2¹⁰ = 221210199997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221210200987 and 221210201005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221210201029) 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, 253100480 + ... + 253101353.

It is an arithmetic number, because the mean of its divisors is an integer number (30372110040).

Almost surely, 2^221210201021 is an apocalyptic number.

It is an amenable number.

221210201021 is a deficient number, since it is larger than the sum of its proper divisors (21766679299).

221210201021 is a wasteful number, since it uses less digits than its factorization.

221210201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506201875.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221210201021 its reverse (120102012122), we get a palindrome (341312213143).

The spelling of 221210201021 in words is "two hundred twenty-one billion, two hundred ten million, two hundred one thousand, twenty-one".