20122202210221 has 4 divisors (see below), whose sum is σ = 20317563396832. Its totient is φ = 19926841023612.

The previous prime is 20122202210189. The next prime is 20122202210239. The reversal of 20122202210221 is 12201220222102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20122202210221 - 2⁵ = 20122202210189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122202210521) 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, 97680593151 + ... + 97680593356.

It is an arithmetic number, because the mean of its divisors is an integer number (5079390849208).

Almost surely, 2^{20122202210221} is an apocalyptic number.

It is an amenable number.

20122202210221 is a deficient number, since it is larger than the sum of its proper divisors (195361186611).

20122202210221 is a wasteful number, since it uses less digits than its factorization.

20122202210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195361186610.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20122202210221 its reverse (12201220222102), we get a palindrome (32323422432323).

The spelling of 20122202210221 in words is "twenty trillion, one hundred twenty-two billion, two hundred two million, two hundred ten thousand, two hundred twenty-one".