2321012220 has 96 divisors (see below), whose sum is σ = 6689819136. Its totient is φ = 600825600.

The previous prime is 2321012209. The next prime is 2321012251. The reversal of 2321012220 is 222101232.

It is a happy number.

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 2321012220.

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 31 ways as a sum of consecutive naturals, for example, 1266705 + ... + 1268535.

It is an arithmetic number, because the mean of its divisors is an integer number (69685616).

Almost surely, 2^2321012220 is an apocalyptic number.

2321012220 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 2321012220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3344909568).

2321012220 is an abundant number, since it is smaller than the sum of its proper divisors (4368806916).

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

2321012220 is a wasteful number, since it uses less digits than its factorization.

2321012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2451 (or 2449 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2321012220 is about 48176.8847062572. The cubic root of 2321012220 is about 1324.0136901010.

Adding to 2321012220 its reverse (222101232), we get a palindrome (2543113452).

It can be divided in two parts, 2321012 and 220, that added together give a palindrome (2321232).

The spelling of 2321012220 in words is "two billion, three hundred twenty-one million, twelve thousand, two hundred twenty".