21201222020222 has 8 divisors (see below), whose sum is σ = 33475613716200. Its totient is φ = 10042684114824.

The previous prime is 21201222020221. The next prime is 21201222020233. The reversal of 21201222020222 is 22202022210212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21201222020194 and 21201222020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201222020221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278963447597 + ... + 278963447672.

It is an arithmetic number, because the mean of its divisors is an integer number (4184451714525).

Almost surely, 2^{21201222020222} is an apocalyptic number.

21201222020222 is a deficient number, since it is larger than the sum of its proper divisors (12274391695978).

21201222020222 is a wasteful number, since it uses less digits than its factorization.

21201222020222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557926895290.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21201222020222 its reverse (22202022210212), we get a palindrome (43403244230434).

The spelling of 21201222020222 in words is "twenty-one trillion, two hundred one billion, two hundred twenty-two million, twenty thousand, two hundred twenty-two".