22021110122220 has 144 divisors (see below), whose sum is σ = 72883191064320. Its totient is φ = 5337473961600.

The previous prime is 22021110122183. The next prime is 22021110122251. The reversal of 22021110122220 is 2222101112022.

It is a happy number.

22021110122220 is a `hidden beast` number, since 220 + 211 + 1 + 0 + 12 + 2 + 220 = 666.

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 = 22021110122193 and 22021110122202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9833475 + ... + 11863365.

It is an arithmetic number, because the mean of its divisors is an integer number (506133271280).

Almost surely, 2^{22021110122220} is an apocalyptic number.

22021110122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22021110122220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36441595532160).

22021110122220 is an abundant number, since it is smaller than the sum of its proper divisors (50862080942100).

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

22021110122220 is a wasteful number, since it uses less digits than its factorization.

22021110122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2035396 (or 2035391 counting only the distinct ones).

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

Adding to 22021110122220 its reverse (2222101112022), we get a palindrome (24243211234242).

The spelling of 22021110122220 in words is "twenty-two trillion, twenty-one billion, one hundred ten million, one hundred twenty-two thousand, two hundred twenty".