22051222220 has 48 divisors (see below), whose sum is σ = 46694491200. Its totient is φ = 8746984704.

The previous prime is 22051222213. The next prime is 22051222229. The reversal of 22051222220 is 2222215022.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22051222192 and 22051222201.

It is not an unprimeable number, because it can be changed into a prime (22051222229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1922342 + ... + 1933778.

It is an arithmetic number, because the mean of its divisors is an integer number (972801900).

Almost surely, 2^22051222220 is an apocalyptic number.

22051222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22051222220 is an abundant number, since it is smaller than the sum of its proper divisors (24643268980).

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

22051222220 is a wasteful number, since it uses less digits than its factorization.

22051222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12242 (or 12240 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 22051222220 its reverse (2222215022), we get a palindrome (24273437242).

The spelling of 22051222220 in words is "twenty-two billion, fifty-one million, two hundred twenty-two thousand, two hundred twenty".