12323155351221 has 144 divisors (see below), whose sum is σ = 21570740611056. Its totient is φ = 6732253440000.

The previous prime is 12323155351219. The next prime is 12323155351249. The reversal of 12323155351221 is 12215355132321.

12323155351221 is a `hidden beast` number, since 1 + 2 + 3 + 2 + 31 + 55 + 351 + 221 = 666.

12323155351221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 172423427121 + 12150731924100 = 415239^2 + 3485790^2 .

It is not a de Polignac number, because 12323155351221 - 2¹ = 12323155351219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12323155351321) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 104320531 + ... + 104438591.

It is an arithmetic number, because the mean of its divisors is an integer number (149796809799).

Almost surely, 2^{12323155351221} is an apocalyptic number.

12323155351221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12323155351221 is a deficient number, since it is larger than the sum of its proper divisors (9247585259835).

12323155351221 is a wasteful number, since it uses less digits than its factorization.

12323155351221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118276 (or 118262 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The spelling of 12323155351221 in words is "twelve trillion, three hundred twenty-three billion, one hundred fifty-five million, three hundred fifty-one thousand, two hundred twenty-one".