22101220205 has 8 divisors (see below), whose sum is σ = 26523002232. Its totient is φ = 17679950848.

The previous prime is 22101220181. The next prime is 22101220231. The reversal of 22101220205 is 50202210122.

It can be written as a sum of positive squares in 4 ways, for example, as 7754211364 + 14347008841 = 88058^2 + 119779^2 .

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 22101220205 - 2²⁰ = 22100171629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25904 + ... + 211833.

It is an arithmetic number, because the mean of its divisors is an integer number (3315375279).

Almost surely, 2^22101220205 is an apocalyptic number.

It is an amenable number.

22101220205 is a deficient number, since it is larger than the sum of its proper divisors (4421782027).

22101220205 is a wasteful number, since it uses less digits than its factorization.

22101220205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256335.

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 22101220205 its reverse (50202210122), we get a palindrome (72303430327).

The spelling of 22101220205 in words is "twenty-two billion, one hundred one million, two hundred twenty thousand, two hundred five".