20221200111220 has 12 divisors (see below), whose sum is σ = 42464520233604. Its totient is φ = 8088480044480.

The previous prime is 20221200111181. The next prime is 20221200111241. The reversal of 20221200111220 is 2211100212202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10983272066404 + 9237928044816 = 3314102^2 + 3039396^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20221200111194 and 20221200111203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505530002761 + ... + 505530002800.

It is an arithmetic number, because the mean of its divisors is an integer number (3538710019467).

Almost surely, 2^{20221200111220} is an apocalyptic number.

20221200111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20221200111220 is an abundant number, since it is smaller than the sum of its proper divisors (22243320122384).

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

20221200111220 is a wasteful number, since it uses less digits than its factorization.

20221200111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011060005570 (or 1011060005568 counting only the distinct ones).

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

Adding to 20221200111220 its reverse (2211100212202), we get a palindrome (22432300323422).

The spelling of 20221200111220 in words is "twenty trillion, two hundred twenty-one billion, two hundred million, one hundred eleven thousand, two hundred twenty".