2202021220 has 96 divisors (see below), whose sum is σ = 5607366912. Its totient is φ = 709091328.

The previous prime is 2202021191. The next prime is 2202021253. The reversal of 2202021220 is 221202022.

It is a self number, because there is not a number n which added to its sum of digits gives 2202021220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2253372 + ... + 2254348.

It is an arithmetic number, because the mean of its divisors is an integer number (58410072).

Almost surely, 2^2202021220 is an apocalyptic number.

2202021220 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 2202021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2803683456).

2202021220 is an abundant number, since it is smaller than the sum of its proper divisors (3405345692).

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

2202021220 is a wasteful number, since it uses less digits than its factorization.

2202021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1957 (or 1955 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 2202021220 is about 46925.6989292648. The cubic root of 2202021220 is about 1300.9896251548.

Adding to 2202021220 its reverse (221202022), we get a palindrome (2423223242).

The spelling of 2202021220 in words is "two billion, two hundred two million, twenty-one thousand, two hundred twenty".