12103312321405 has 8 divisors (see below), whose sum is σ = 14524497228600. Its totient is φ = 9682301561856.

The previous prime is 12103312321403. The next prime is 12103312321409. The reversal of 12103312321405 is 50412321330121.

It can be written as a sum of positive squares in 4 ways, for example, as 250626391876 + 11852685929529 = 500626^2 + 3442773^2 .

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 12103312321405 - 2¹ = 12103312321403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12103312321403) 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, 43383960 + ... + 43662049.

It is an arithmetic number, because the mean of its divisors is an integer number (1815562153575).

Almost surely, 2^{12103312321405} is an apocalyptic number.

It is an amenable number.

12103312321405 is a deficient number, since it is larger than the sum of its proper divisors (2421184907195).

12103312321405 is an equidigital number, since it uses as much as digits as its factorization.

12103312321405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87073823.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 12103312321405 its reverse (50412321330121), we get a palindrome (62515633651526).

The spelling of 12103312321405 in words is "twelve trillion, one hundred three billion, three hundred twelve million, three hundred twenty-one thousand, four hundred five".