12123211312321 has 8 divisors (see below), whose sum is σ = 12192244416000. Its totient is φ = 12054192716400.

The previous prime is 12123211312309. The next prime is 12123211312327. The reversal of 12123211312321 is 12321311232121.

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 12123211312321 - 2¹³ = 12123211304129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12123211312327) 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, 1948705 + ... + 5295646.

It is an arithmetic number, because the mean of its divisors is an integer number (1524030552000).

Almost surely, 2^{12123211312321} is an apocalyptic number.

It is an amenable number.

12123211312321 is a deficient number, since it is larger than the sum of its proper divisors (69033103679).

12123211312321 is an equidigital number, since it uses as much as digits as its factorization.

12123211312321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7253879.

The product of its digits is 864, while the sum is 25.

Adding to 12123211312321 its reverse (12321311232121), we get a palindrome (24444522544442).

The spelling of 12123211312321 in words is "twelve trillion, one hundred twenty-three billion, two hundred eleven million, three hundred twelve thousand, three hundred twenty-one".