12220323240 has 32 divisors (see below), whose sum is σ = 36660970080. Its totient is φ = 3258752832.

The previous prime is 12220323229. The next prime is 12220323251. The reversal of 12220323240 is 4232302221.

It is an interprime number because it is at equal distance from previous prime (12220323229) and next prime (12220323251).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50917894 + ... + 50918133.

It is an arithmetic number, because the mean of its divisors is an integer number (1145655315).

Almost surely, 2^12220323240 is an apocalyptic number.

12220323240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12220323240 is an abundant number, since it is smaller than the sum of its proper divisors (24440646840).

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

12220323240 is a wasteful number, since it uses less digits than its factorization.

12220323240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101836041 (or 101836037 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 12220323240 its reverse (4232302221), we get a palindrome (16452625461).

The spelling of 12220323240 in words is "twelve billion, two hundred twenty million, three hundred twenty-three thousand, two hundred forty".