221010211010221 has 16 divisors (see below), whose sum is σ = 240151519590400. Its totient is φ = 202620080458800.

The previous prime is 221010211010219. The next prime is 221010211010233. The reversal of 221010211010221 is 122010112010122.

It is a cyclic number.

It is not a de Polignac number, because 221010211010221 - 2¹ = 221010211010219 is a prime.

It is a super-3 number, since 3×221010211010221³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221010211010195 and 221010211010204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221010211080221) 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, 27400786 + ... + 34537276.

It is an arithmetic number, because the mean of its divisors is an integer number (15009469974400).

Almost surely, 2^{221010211010221} is an apocalyptic number.

It is an amenable number.

221010211010221 is a deficient number, since it is larger than the sum of its proper divisors (19141308580179).

221010211010221 is a wasteful number, since it uses less digits than its factorization.

221010211010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7189120.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221010211010221 its reverse (122010112010122), we get a palindrome (343020323020343).

Subtracting from 221010211010221 its reverse (122010112010122), we obtain a palindrome (99000099000099).

The spelling of 221010211010221 in words is "two hundred twenty-one trillion, ten billion, two hundred eleven million, ten thousand, two hundred twenty-one".