12003121133021 has 4 divisors (see below), whose sum is σ = 12003129212412. Its totient is φ = 12003113053632.

The previous prime is 12003121132969. The next prime is 12003121133041. The reversal of 12003121133021 is 12033112130021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3808699624921 + 8194421508100 = 1951589^2 + 2862590^2 .

It is a cyclic number.

It is not a de Polignac number, because 12003121133021 - 2⁶ = 12003121132957 is a prime.

It is a super-3 number, since 3×12003121133021³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12003121132984 and 12003121133002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12003121133041) 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, 1096406 + ... + 5020791.

It is an arithmetic number, because the mean of its divisors is an integer number (3000782303103).

Almost surely, 2^{12003121133021} is an apocalyptic number.

It is an amenable number.

12003121133021 is a deficient number, since it is larger than the sum of its proper divisors (8079391).

12003121133021 is an equidigital number, since it uses as much as digits as its factorization.

12003121133021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8079390.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 12003121133021 its reverse (12033112130021), we get a palindrome (24036233263042).

The spelling of 12003121133021 in words is "twelve trillion, three billion, one hundred twenty-one million, one hundred thirty-three thousand, twenty-one".