220121122101220 has 12 divisors (see below), whose sum is σ = 462254356412604. Its totient is φ = 88048448840480.

The previous prime is 220121122101203. The next prime is 220121122101239. The reversal of 220121122101220 is 22101221121022.

It can be written as a sum of positive squares in 2 ways, for example, as 97170858270784 + 122950263830436 = 9857528^2 + 11088294^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5503028052511 + ... + 5503028052550.

It is an arithmetic number, because the mean of its divisors is an integer number (38521196367717).

Almost surely, 2^{220121122101220} is an apocalyptic number.

220121122101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220121122101220 is an abundant number, since it is smaller than the sum of its proper divisors (242133234311384).

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

220121122101220 is a wasteful number, since it uses less digits than its factorization.

220121122101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11006056105070 (or 11006056105068 counting only the distinct ones).

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

Adding to 220121122101220 its reverse (22101221121022), we get a palindrome (242222343222242).

The spelling of 220121122101220 in words is "two hundred twenty trillion, one hundred twenty-one billion, one hundred twenty-two million, one hundred one thousand, two hundred twenty".