22120021020 has 24 divisors (see below), whose sum is σ = 61936059024. Its totient is φ = 5898672256.

The previous prime is 22120021013. The next prime is 22120021031. The reversal of 22120021020 is 2012002122.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 22120020987 and 22120021005.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 184333449 + ... + 184333568.

It is an arithmetic number, because the mean of its divisors is an integer number (2580669126).

Almost surely, 2^22120021020 is an apocalyptic number.

22120021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22120021020 is an abundant number, since it is smaller than the sum of its proper divisors (39816038004).

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

22120021020 is a wasteful number, since it uses less digits than its factorization.

22120021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368667029 (or 368667027 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 22120021020 its reverse (2012002122), we get a palindrome (24132023142).

The spelling of 22120021020 in words is "twenty-two billion, one hundred twenty million, twenty-one thousand, twenty".