22213321220 has 24 divisors (see below), whose sum is σ = 46773051864. Its totient is φ = 8861504256.

The previous prime is 22213321213. The next prime is 22213321241. The reversal of 22213321220 is 2212331222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2212573444 + 20000747776 = 47038^2 + 141424^2 .

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 = 22213321192 and 22213321201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1481369 + ... + 1496288.

It is an arithmetic number, because the mean of its divisors is an integer number (1948877161).

Almost surely, 2^22213321220 is an apocalyptic number.

22213321220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22213321220 is an abundant number, since it is smaller than the sum of its proper divisors (24559730644).

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

22213321220 is a wasteful number, since it uses less digits than its factorization.

22213321220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2978039 (or 2978037 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 22213321220 its reverse (2212331222), we get a palindrome (24425652442).

The spelling of 22213321220 in words is "twenty-two billion, two hundred thirteen million, three hundred twenty-one thousand, two hundred twenty".