12015222320 has 40 divisors (see below), whose sum is σ = 27940024224. Its totient is φ = 4805292032.

The previous prime is 12015222281. The next prime is 12015222367. The reversal of 12015222320 is 2322251021.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12015222292 and 12015222301.

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, 812432 + ... + 827088.

Almost surely, 2^12015222320 is an apocalyptic number.

12015222320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12015222320 is an abundant number, since it is smaller than the sum of its proper divisors (15924801904).

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

12015222320 is a wasteful number, since it uses less digits than its factorization.

12015222320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24917 (or 24911 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 12015222320 its reverse (2322251021), we get a palindrome (14337473341).

The spelling of 12015222320 in words is "twelve billion, fifteen million, two hundred twenty-two thousand, three hundred twenty".