21020201022222 has 32 divisors (see below), whose sum is σ = 46712653011360. Its totient is φ = 7006569396480.

The previous prime is 21020201022211. The next prime is 21020201022253. The reversal of 21020201022222 is 22222010202012.

21020201022222 is a `hidden beast` number, since 210 + 202 + 0 + 10 + 22 + 222 = 666.

It is a super-3 number, since 3×21020201022222³ (a number of 41 digits) contains 333 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 = 21020201022195 and 21020201022204.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2227779 + ... + 6855902.

It is an arithmetic number, because the mean of its divisors is an integer number (1459770406605).

Almost surely, 2^{21020201022222} is an apocalyptic number.

21020201022222 is an abundant number, since it is smaller than the sum of its proper divisors (25692451989138).

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

21020201022222 is a wasteful number, since it uses less digits than its factorization.

21020201022222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9126545 (or 9126539 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21020201022222 its reverse (22222010202012), we get a palindrome (43242211224234).

The spelling of 21020201022222 in words is "twenty-one trillion, twenty billion, two hundred one million, twenty-two thousand, two hundred twenty-two".