221122122101 has 4 divisors (see below), whose sum is σ = 234129305772. Its totient is φ = 208114938432.

The previous prime is 221122122097. The next prime is 221122122187. The reversal of 221122122101 is 101221221122.

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 188139930001 + 32982192100 = 433751^2 + 181610^2 .

It is a cyclic number.

It is not a de Polignac number, because 221122122101 - 2² = 221122122097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 13007183653 = 221122122101 / (2 + 2 + 1 + 1 + 2 + 2 + 1 + 2 + 2 + 1 + 0 + 1).

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 221122122101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221122122701) 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, 6503591810 + ... + 6503591843.

It is an arithmetic number, because the mean of its divisors is an integer number (58532326443).

Almost surely, 2^221122122101 is an apocalyptic number.

It is an amenable number.

221122122101 is a deficient number, since it is larger than the sum of its proper divisors (13007183671).

221122122101 is a wasteful number, since it uses less digits than its factorization.

221122122101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13007183670.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221122122101 its reverse (101221221122), we get a palindrome (322343343223).

It can be divided in two parts, 2211221 and 22101, that added together give a palindrome (2233322).

The spelling of 221122122101 in words is "two hundred twenty-one billion, one hundred twenty-two million, one hundred twenty-two thousand, one hundred one".