2013221101220 has 144 divisors (see below), whose sum is σ = 5178102491520. Its totient is φ = 643893927936.

The previous prime is 2013221101217. The next prime is 2013221101231. The reversal of 2013221101220 is 221011223102.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4351811 + ... + 4792149.

It is an arithmetic number, because the mean of its divisors is an integer number (35959045080).

Almost surely, 2^{2013221101220} is an apocalyptic number.

2013221101220 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 2013221101220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2589051245760).

2013221101220 is an abundant number, since it is smaller than the sum of its proper divisors (3164881390300).

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

2013221101220 is a wasteful number, since it uses less digits than its factorization.

2013221101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440502 (or 440483 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 2013221101220 its reverse (221011223102), we get a palindrome (2234232324322).

The spelling of 2013221101220 in words is "two trillion, thirteen billion, two hundred twenty-one million, one hundred one thousand, two hundred twenty".