20221120011220 has 24 divisors (see below), whose sum is σ = 43612037214984. Its totient is φ = 7869841301376.

The previous prime is 20221120011217. The next prime is 20221120011227. The reversal of 20221120011220 is 2211002112202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1960078400784 + 18261041610436 = 1400028^2 + 4273294^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20221120011194 and 20221120011203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221120011227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13662918187 + ... + 13662919666.

It is an arithmetic number, because the mean of its divisors is an integer number (1817168217291).

Almost surely, 2^{20221120011220} is an apocalyptic number.

20221120011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20221120011220 is an abundant number, since it is smaller than the sum of its proper divisors (23390917203764).

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

20221120011220 is a wasteful number, since it uses less digits than its factorization.

20221120011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27325837899 (or 27325837897 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20221120011220 its reverse (2211002112202), we get a palindrome (22432122123422).

The spelling of 20221120011220 in words is "twenty trillion, two hundred twenty-one billion, one hundred twenty million, eleven thousand, two hundred twenty".