221210011021 has 8 divisors (see below), whose sum is σ = 234913288320. Its totient is φ = 207712798272.

The previous prime is 221210011007. The next prime is 221210011031. The reversal of 221210011021 is 120110012122.

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 221210011021 - 2³³ = 212620076429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221210010992 and 221210011010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221210011031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51513925 + ... + 51518218.

It is an arithmetic number, because the mean of its divisors is an integer number (29364161040).

Almost surely, 2^221210011021 is an apocalyptic number.

It is an amenable number.

221210011021 is a deficient number, since it is larger than the sum of its proper divisors (13703277299).

221210011021 is a wasteful number, since it uses less digits than its factorization.

221210011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103032275.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221210011021 its reverse (120110012122), we get a palindrome (341320023143).

The spelling of 221210011021 in words is "two hundred twenty-one billion, two hundred ten million, eleven thousand, twenty-one".