21211100220022 has 8 divisors (see below), whose sum is σ = 31821301227672. Its totient is φ = 10603999810800.

The previous prime is 21211100219963. The next prime is 21211100220041. The reversal of 21211100220022 is 22002200111212.

It is a happy number.

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 = 21211100219978 and 21211100220005.

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, 775132504 + ... + 775159867.

It is an arithmetic number, because the mean of its divisors is an integer number (3977662653459).

Almost surely, 2^{21211100220022} is an apocalyptic number.

21211100220022 is a deficient number, since it is larger than the sum of its proper divisors (10610201007650).

21211100220022 is a wasteful number, since it uses less digits than its factorization.

21211100220022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550299214.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21211100220022 its reverse (22002200111212), we get a palindrome (43213300331234).

The spelling of 21211100220022 in words is "twenty-one trillion, two hundred eleven billion, one hundred million, two hundred twenty thousand, twenty-two".