22001201221220 has 96 divisors (see below), whose sum is σ = 51925178172672. Its totient is φ = 7769532722688.

The previous prime is 22001201221211. The next prime is 22001201221231. The reversal of 22001201221220 is 2212210210022.

It is a happy number.

It is a super-2 number, since 2×22001201221220² (a number of 27 digits) contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 60173879 + ... + 60538401.

It is an arithmetic number, because the mean of its divisors is an integer number (540887272632).

Almost surely, 2^{22001201221220} is an apocalyptic number.

22001201221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22001201221220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25962589086336).

22001201221220 is an abundant number, since it is smaller than the sum of its proper divisors (29923976951452).

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

22001201221220 is a wasteful number, since it uses less digits than its factorization.

22001201221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374661 (or 374659 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22001201221220 its reverse (2212210210022), we get a palindrome (24213411431242).

The spelling of 22001201221220 in words is "twenty-two trillion, one billion, two hundred one million, two hundred twenty-one thousand, two hundred twenty".