12221321210232 has 128 divisors (see below), whose sum is σ = 32219317002240. Its totient is φ = 3857357629440.

The previous prime is 12221321210209. The next prime is 12221321210269. The reversal of 12221321210232 is 23201212312221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124332048 + ... + 124430304.

It is an arithmetic number, because the mean of its divisors is an integer number (251713414080).

Almost surely, 2^{12221321210232} is an apocalyptic number.

12221321210232 is a gapful number since it is divisible by the number (12) 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 12221321210232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16109658501120).

12221321210232 is an abundant number, since it is smaller than the sum of its proper divisors (19997995792008).

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

12221321210232 is a wasteful number, since it uses less digits than its factorization.

12221321210232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101901 (or 101897 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 12221321210232 its reverse (23201212312221), we get a palindrome (35422533522453).

The spelling of 12221321210232 in words is "twelve trillion, two hundred twenty-one billion, three hundred twenty-one million, two hundred ten thousand, two hundred thirty-two".