220121222111220 has 48 divisors (see below), whose sum is σ = 617676383858688. Its totient is φ = 58571662853760.

The previous prime is 220121222111183. The next prime is 220121222111239. The reversal of 220121222111220 is 22111222121022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3979025524 + ... + 3979080843.

It is an arithmetic number, because the mean of its divisors is an integer number (12868257997056).

Almost surely, 2^{220121222111220} is an apocalyptic number.

220121222111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220121222111220 is an abundant number, since it is smaller than the sum of its proper divisors (397555161747468).

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

220121222111220 is a wasteful number, since it uses less digits than its factorization.

220121222111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7958106840 (or 7958106838 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 220121222111220 its reverse (22111222121022), we get a palindrome (242232444232242).

The spelling of 220121222111220 in words is "two hundred twenty trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred eleven thousand, two hundred twenty".