221212202212101 has 8 divisors (see below), whose sum is σ = 296071084330560. Its totient is φ = 146914060784192.

The previous prime is 221212202212063. The next prime is 221212202212151. The reversal of 221212202212101 is 101212202212122.

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 221212202212101 - 2⁴⁵ = 186027830123269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212202212151) 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, 140185171716 + ... + 140185173293.

It is an arithmetic number, because the mean of its divisors is an integer number (37008885541320).

Almost surely, 2^{221212202212101} is an apocalyptic number.

It is an amenable number.

221212202212101 is a deficient number, since it is larger than the sum of its proper divisors (74858882118459).

221212202212101 is a wasteful number, since it uses less digits than its factorization.

221212202212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280370345275.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221212202212101 its sum of digits (21), we get a palindrome (221212202212122).

Adding to 221212202212101 its reverse (101212202212122), we get a palindrome (322424404424223).

The spelling of 221212202212101 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred two million, two hundred twelve thousand, one hundred one".