12041420021 has 4 divisors (see below), whose sum is σ = 12087205152. Its totient is φ = 11995634892.

The previous prime is 12041419997. The next prime is 12041420033. The reversal of 12041420021 is 12002414021.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12002414021 = 13 ⋅923262617.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12041420021 is a prime.

It is a super-2 number, since 2×12041420021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12041410021) 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, 22892171 + ... + 22892696.

It is an arithmetic number, because the mean of its divisors is an integer number (3021801288).

Almost surely, 2^12041420021 is an apocalyptic number.

It is an amenable number.

12041420021 is a deficient number, since it is larger than the sum of its proper divisors (45785131).

12041420021 is an equidigital number, since it uses as much as digits as its factorization.

12041420021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45785130.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12041420021 its reverse (12002414021), we get a palindrome (24043834042).

The spelling of 12041420021 in words is "twelve billion, forty-one million, four hundred twenty thousand, twenty-one".