4012211220 has 96 divisors (see below), whose sum is σ = 11447654400. Its totient is φ = 1049668224.

The previous prime is 4012211197. The next prime is 4012211233. The reversal of 4012211220 is 221122104.

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 4012211220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2572801 + ... + 2574359.

It is an arithmetic number, because the mean of its divisors is an integer number (119246400).

Almost surely, 2^4012211220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4012211220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5723827200).

4012211220 is an abundant number, since it is smaller than the sum of its proper divisors (7435443180).

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

4012211220 is a wasteful number, since it uses less digits than its factorization.

4012211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357 (or 2355 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 4012211220 is about 63342.0178080869. The cubic root of 4012211220 is about 1589.0147529319.

Adding to 4012211220 its reverse (221122104), we get a palindrome (4233333324).

The spelling of 4012211220 in words is "four billion, twelve million, two hundred eleven thousand, two hundred twenty".