13120140432321 has 32 divisors (see below), whose sum is σ = 20934745301120. Its totient is φ = 8073034817472.

The previous prime is 13120140432317. The next prime is 13120140432341. The reversal of 13120140432321 is 12323404102131.

13120140432321 is a `hidden beast` number, since 1 + 3 + 1 + 20 + 1 + 404 + 3 + 232 + 1 = 666.

It is not a de Polignac number, because 13120140432321 - 2² = 13120140432317 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13120140432341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1089930 + ... + 5237196.

It is an arithmetic number, because the mean of its divisors is an integer number (654210790660).

Almost surely, 2^{13120140432321} is an apocalyptic number.

It is an amenable number.

13120140432321 is a deficient number, since it is larger than the sum of its proper divisors (7814604868799).

13120140432321 is a wasteful number, since it uses less digits than its factorization.

13120140432321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4156302 (or 4156296 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 13120140432321 its reverse (12323404102131), we get a palindrome (25443544534452).

The spelling of 13120140432321 in words is "thirteen trillion, one hundred twenty billion, one hundred forty million, four hundred thirty-two thousand, three hundred twenty-one".