12221321130 has 48 divisors (see below), whose sum is σ = 31783629384. Its totient is φ = 3258178560.

The previous prime is 12221321117. The next prime is 12221321141. The reversal of 12221321130 is 3112312221.

It can be written as a sum of positive squares in 4 ways, for example, as 8356336569 + 3864984561 = 91413^2 + 62169^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 384402 + ... + 414978.

Almost surely, 2^12221321130 is an apocalyptic number.

12221321130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12221321130 is an abundant number, since it is smaller than the sum of its proper divisors (19562308254).

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

12221321130 is a wasteful number, since it uses less digits than its factorization.

12221321130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35031 (or 35028 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12221321130 its reverse (3112312221), we get a palindrome (15333633351).

The spelling of 12221321130 in words is "twelve billion, two hundred twenty-one million, three hundred twenty-one thousand, one hundred thirty".