4211321220 has 144 divisors (see below), whose sum is σ = 13307898240. Its totient is φ = 1117898496.

The previous prime is 4211321197. The next prime is 4211321237. The reversal of 4211321220 is 221231124.

It is a happy number.

4211321220 is a `hidden beast` number, since 421 + 1 + 3 + 21 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 4211321193 and 4211321202.

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, 1130521 + ... + 1134239.

It is an arithmetic number, because the mean of its divisors is an integer number (92415960).

Almost surely, 2^4211321220 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 4211321220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6653949120).

4211321220 is an abundant number, since it is smaller than the sum of its proper divisors (9096577020).

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

4211321220 is a wasteful number, since it uses less digits than its factorization.

4211321220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3976 (or 3962 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 4211321220 is about 64894.6933115490. The cubic root of 4211321220 is about 1614.8770264239.

Adding to 4211321220 its reverse (221231124), we get a palindrome (4432552344).

The spelling of 4211321220 in words is "four billion, two hundred eleven million, three hundred twenty-one thousand, two hundred twenty".