12013001021121 has 4 divisors (see below), whose sum is σ = 16017334694832. Its totient is φ = 8008667347412.

The previous prime is 12013001021081. The next prime is 12013001021137. The reversal of 12013001021121 is 12112010031021.

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 12013001021121 - 2⁶ = 12013001021057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12013001021121.

It is not an unprimeable number, because it can be changed into a prime (12013001021821) 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, 2002166836851 + ... + 2002166836856.

It is an arithmetic number, because the mean of its divisors is an integer number (4004333673708).

Almost surely, 2^{12013001021121} is an apocalyptic number.

It is an amenable number.

12013001021121 is a deficient number, since it is larger than the sum of its proper divisors (4004333673711).

12013001021121 is an equidigital number, since it uses as much as digits as its factorization.

12013001021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004333673710.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 12013001021121 its reverse (12112010031021), we get a palindrome (24125011052142).

The spelling of 12013001021121 in words is "twelve trillion, thirteen billion, one million, twenty-one thousand, one hundred twenty-one".