12121321132001 has 4 divisors (see below), whose sum is σ = 12152969490432. Its totient is φ = 12089672773572.

The previous prime is 12121321131967. The next prime is 12121321132021. The reversal of 12121321132001 is 10023112312121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12121321132001 - 2¹⁰ = 12121321130977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121321132021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15824178641 + ... + 15824179406.

It is an arithmetic number, because the mean of its divisors is an integer number (3038242372608).

Almost surely, 2^{12121321132001} is an apocalyptic number.

It is an amenable number.

12121321132001 is a deficient number, since it is larger than the sum of its proper divisors (31648358431).

12121321132001 is an equidigital number, since it uses as much as digits as its factorization.

12121321132001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31648358430.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 12121321132001 its reverse (10023112312121), we get a palindrome (22144433444122).

The spelling of 12121321132001 in words is "twelve trillion, one hundred twenty-one billion, three hundred twenty-one million, one hundred thirty-two thousand, one".