12331221320122 has 4 divisors (see below), whose sum is σ = 18496831980186. Its totient is φ = 6165610660060.

The previous prime is 12331221320107. The next prime is 12331221320141. The reversal of 12331221320122 is 22102312213321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11333921494921 + 997299825201 = 3366589^2 + 998649^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3082805330029 + ... + 3082805330032.

Almost surely, 2^{12331221320122} is an apocalyptic number.

12331221320122 is a deficient number, since it is larger than the sum of its proper divisors (6165610660064).

12331221320122 is an equidigital number, since it uses as much as digits as its factorization.

12331221320122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6165610660063.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 12331221320122 its reverse (22102312213321), we get a palindrome (34433533533443).

The spelling of 12331221320122 in words is "twelve trillion, three hundred thirty-one billion, two hundred twenty-one million, three hundred twenty thousand, one hundred twenty-two".