4311021220 has 24 divisors (see below), whose sum is σ = 9876158208. Its totient is φ = 1567644000.

The previous prime is 4311021191. The next prime is 4311021227. The reversal of 4311021220 is 221201134.

It is a junction number, because it is equal to n+sod(n) for n = 4311021194 and 4311021203.

It is not an unprimeable number, because it can be changed into a prime (4311021227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9797556 + ... + 9797995.

It is an arithmetic number, because the mean of its divisors is an integer number (411506592).

Almost surely, 2^4311021220 is an apocalyptic number.

It is an amenable number.

4311021220 is an abundant number, since it is smaller than the sum of its proper divisors (5565136988).

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

4311021220 is a wasteful number, since it uses less digits than its factorization.

4311021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19595571 (or 19595569 counting only the distinct ones).

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

The square root of 4311021220 is about 65658.3674789436. The cubic root of 4311021220 is about 1627.5214466543.

Adding to 4311021220 its reverse (221201134), we get a palindrome (4532222354).

The spelling of 4311021220 in words is "four billion, three hundred eleven million, twenty-one thousand, two hundred twenty".