13121132312321 has 8 divisors (see below), whose sum is σ = 14318453920224. Its totient is φ = 11924559270720.

The previous prime is 13121132312269. The next prime is 13121132312329. The reversal of 13121132312321 is 12321323112131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13121132312321 - 2¹⁸ = 13121132050177 is a prime.

It is a super-2 number, since 2×13121132312321² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13121132312329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187104920 + ... + 187175033.

It is an arithmetic number, because the mean of its divisors is an integer number (1789806740028).

Almost surely, 2^{13121132312321} is an apocalyptic number.

13121132312321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13121132312321 is a deficient number, since it is larger than the sum of its proper divisors (1197321607903).

13121132312321 is a wasteful number, since it uses less digits than its factorization.

13121132312321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374283151.

The product of its digits is 1296, while the sum is 26.

Adding to 13121132312321 its reverse (12321323112131), we get a palindrome (25442455424452).

The spelling of 13121132312321 in words is "thirteen trillion, one hundred twenty-one billion, one hundred thirty-two million, three hundred twelve thousand, three hundred twenty-one".