21222111020022 has 96 divisors (see below), whose sum is σ = 53494123213440. Its totient is φ = 6009107592960.

The previous prime is 21222111019951. The next prime is 21222111020029. The reversal of 21222111020022 is 22002011122212.

It is a happy number.

21222111020022 is a `hidden beast` number, since 212 + 221 + 1 + 10 + 200 + 22 = 666.

It is a super-2 number, since 2×21222111020022² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21222111019977 and 21222111020004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222111020029) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22211428 + ... + 23147175.

It is an arithmetic number, because the mean of its divisors is an integer number (557230450140).

Almost surely, 2^{21222111020022} is an apocalyptic number.

21222111020022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21222111020022 is an abundant number, since it is smaller than the sum of its proper divisors (32272012193418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21222111020022 is a wasteful number, since it uses less digits than its factorization.

21222111020022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45358778 (or 45358775 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21222111020022 its reverse (22002011122212), we get a palindrome (43224122142234).

The spelling of 21222111020022 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred eleven million, twenty thousand, twenty-two".