220121201121220 has 48 divisors (see below), whose sum is σ = 528302527401600. Its totient is φ = 75468462568704.

The previous prime is 220121201121209. The next prime is 220121201121251. The reversal of 220121201121220 is 22121102121022.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10945945 + ... + 23665504.

It is an arithmetic number, because the mean of its divisors is an integer number (11006302654200).

Almost surely, 2^{220121201121220} is an apocalyptic number.

220121201121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220121201121220 is an abundant number, since it is smaller than the sum of its proper divisors (308181326280380).

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

220121201121220 is a wasteful number, since it uses less digits than its factorization.

220121201121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34656892 (or 34656890 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 220121201121220 its reverse (22121102121022), we get a palindrome (242242303242242).

The spelling of 220121201121220 in words is "two hundred twenty trillion, one hundred twenty-one billion, two hundred one million, one hundred twenty-one thousand, two hundred twenty".