21202220012222 has 8 divisors (see below), whose sum is σ = 31845121518672. Its totient is φ = 10587179506000.

The previous prime is 21202220012213. The next prime is 21202220012251. The reversal of 21202220012222 is 22221002220212.

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 = 21202220012194 and 21202220012203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6965248154 + ... + 6965251197.

It is an arithmetic number, because the mean of its divisors is an integer number (3980640189834).

Almost surely, 2^{21202220012222} is an apocalyptic number.

21202220012222 is a deficient number, since it is larger than the sum of its proper divisors (10642901506450).

21202220012222 is a wasteful number, since it uses less digits than its factorization.

21202220012222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13930500114.

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

Adding to 21202220012222 its reverse (22221002220212), we get a palindrome (43423222232434).

The spelling of 21202220012222 in words is "twenty-one trillion, two hundred two billion, two hundred twenty million, twelve thousand, two hundred twenty-two".