12131231322 has 16 divisors (see below), whose sum is σ = 27728528832. Its totient is φ = 3466066080.

The previous prime is 12131231293. The next prime is 12131231339. The reversal of 12131231322 is 22313213121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

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, 144419379 + ... + 144419462.

It is an arithmetic number, because the mean of its divisors is an integer number (1733033052).

Almost surely, 2^12131231322 is an apocalyptic number.

12131231322 is an abundant number, since it is smaller than the sum of its proper divisors (15597297510).

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

12131231322 is a wasteful number, since it uses less digits than its factorization.

12131231322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288838853.

The product of its digits is 432, while the sum is 21.

Adding to 12131231322 its reverse (22313213121), we get a palindrome (34444444443).

The spelling of 12131231322 in words is "twelve billion, one hundred thirty-one million, two hundred thirty-one thousand, three hundred twenty-two".