221032212101 has 4 divisors (see below), whose sum is σ = 221044697100. Its totient is φ = 221019727104.

The previous prime is 221032212077. The next prime is 221032212143. The reversal of 221032212101 is 101212230122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49635384100 + 171396828001 = 222790^2 + 414001^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221032212101 is a prime.

It is a super-2 number, since 2×221032212101² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221032212101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221032212901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6215906 + ... + 6251363.

It is an arithmetic number, because the mean of its divisors is an integer number (55261174275).

Almost surely, 2^221032212101 is an apocalyptic number.

It is an amenable number.

221032212101 is a deficient number, since it is larger than the sum of its proper divisors (12484999).

221032212101 is a wasteful number, since it uses less digits than its factorization.

221032212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12484998.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 221032212101 its reverse (101212230122), we get a palindrome (322244442223).

The spelling of 221032212101 in words is "two hundred twenty-one billion, thirty-two million, two hundred twelve thousand, one hundred one".