12221325320 has 32 divisors (see below), whose sum is σ = 27616020120. Its totient is φ = 4867545600.

The previous prime is 12221325307. The next prime is 12221325343. The reversal of 12221325320 is 2352312221.

It can be written as a sum of positive squares in 4 ways, for example, as 8975288644 + 3246036676 = 94738^2 + 56974^2 .

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, 646331 + ... + 664970.

Almost surely, 2^12221325320 is an apocalyptic number.

12221325320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221325320 is an abundant number, since it is smaller than the sum of its proper divisors (15394694800).

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

12221325320 is a wasteful number, since it uses less digits than its factorization.

12221325320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311545 (or 1311541 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 12221325320 its reverse (2352312221), we get a palindrome (14573637541).

The spelling of 12221325320 in words is "twelve billion, two hundred twenty-one million, three hundred twenty-five thousand, three hundred twenty".