12032120213021 has 4 divisors (see below), whose sum is σ = 12034341396252. Its totient is φ = 12029899029792.

The previous prime is 12032120212997. The next prime is 12032120213027. The reversal of 12032120213021 is 12031202123021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4250173944025 + 7781946268996 = 2061595^2 + 2789614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12032120213021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12032120212984 and 12032120213002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12032120213027) 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, 1110583490 + ... + 1110594323.

It is an arithmetic number, because the mean of its divisors is an integer number (3008585349063).

Almost surely, 2^{12032120213021} is an apocalyptic number.

It is an amenable number.

12032120213021 is a deficient number, since it is larger than the sum of its proper divisors (2221183231).

12032120213021 is an equidigital number, since it uses as much as digits as its factorization.

12032120213021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221183230.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 12032120213021 its reverse (12031202123021), we get a palindrome (24063322336042).

Subtracting from 12032120213021 its reverse (12031202123021), we obtain a square (918090000 = 30300²).

The spelling of 12032120213021 in words is "twelve trillion, thirty-two billion, one hundred twenty million, two hundred thirteen thousand, twenty-one".