2201321220 has 48 divisors (see below), whose sum is σ = 7044229248. Its totient is φ = 503159040.

The previous prime is 2201321219. The next prime is 2201321251. The reversal of 2201321220 is 221231022.

It is a happy number.

It is a super-2 number, since 2×2201321220² = 9691630227244576800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2201321220.

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, 2620201 + ... + 2621040.

It is an arithmetic number, because the mean of its divisors is an integer number (146754776).

Almost surely, 2^2201321220 is an apocalyptic number.

2201321220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2201321220 is an abundant number, since it is smaller than the sum of its proper divisors (4842908028).

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

2201321220 is a wasteful number, since it uses less digits than its factorization.

2201321220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5241260 (or 5241258 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2201321220 is about 46918.2397368017. The cubic root of 2201321220 is about 1300.8517534506.

Adding to 2201321220 its reverse (221231022), we get a palindrome (2422552242).

The spelling of 2201321220 in words is "two billion, two hundred one million, three hundred twenty-one thousand, two hundred twenty".