12133121021 has 32 divisors (see below), whose sum is σ = 14529715200. Its totient is φ = 9915995520.

The previous prime is 12133120997. The next prime is 12133121027. The reversal of 12133121021 is 12012133121.

It is a cyclic number.

It is not a de Polignac number, because 12133121021 - 2⁶ = 12133120957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12133121027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3029006 + ... + 3033008.

It is an arithmetic number, because the mean of its divisors is an integer number (454053600).

Almost surely, 2^12133121021 is an apocalyptic number.

It is an amenable number.

12133121021 is a deficient number, since it is larger than the sum of its proper divisors (2396594179).

12133121021 is a wasteful number, since it uses less digits than its factorization.

12133121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4289.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12133121021 its reverse (12012133121), we get a palindrome (24145254142).

The spelling of 12133121021 in words is "twelve billion, one hundred thirty-three million, one hundred twenty-one thousand, twenty-one".