101221210221 has 8 divisors (see below), whose sum is σ = 135050235360. Its totient is φ = 67436495952.

The previous prime is 101221210213. The next prime is 101221210253. The reversal of 101221210221 is 122012122101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 101221210221 - 2³ = 101221210213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101221210221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221212221) 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, 11072386 + ... + 11081523.

It is an arithmetic number, because the mean of its divisors is an integer number (16881279420).

Almost surely, 2^101221210221 is an apocalyptic number.

It is an amenable number.

101221210221 is a deficient number, since it is larger than the sum of its proper divisors (33829025139).

101221210221 is a wasteful number, since it uses less digits than its factorization.

101221210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22155435.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 101221210221 its reverse (122012122101), we get a palindrome (223233332322).

The spelling of 101221210221 in words is "one hundred one billion, two hundred twenty-one million, two hundred ten thousand, two hundred twenty-one".