4021311220 has 12 divisors (see below), whose sum is σ = 8444753604. Its totient is φ = 1608524480.

The previous prime is 4021311169. The next prime is 4021311247. The reversal of 4021311220 is 221131204.

It can be written as a sum of positive squares in 2 ways, for example, as 2083374736 + 1937936484 = 45644^2 + 44022^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4021311194 and 4021311203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100532761 + ... + 100532800.

It is an arithmetic number, because the mean of its divisors is an integer number (703729467).

Almost surely, 2^4021311220 is an apocalyptic number.

It is an amenable number.

4021311220 is an abundant number, since it is smaller than the sum of its proper divisors (4423442384).

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

4021311220 is a wasteful number, since it uses less digits than its factorization.

4021311220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201065570 (or 201065568 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 4021311220 is about 63413.8093793458. The cubic root of 4021311220 is about 1590.2151812461.

Adding to 4021311220 its reverse (221131204), we get a palindrome (4242442424).

The spelling of 4021311220 in words is "four billion, twenty-one million, three hundred eleven thousand, two hundred twenty".