12013021021 has 4 divisors (see below), whose sum is σ = 12027547872. Its totient is φ = 11998494172.

The previous prime is 12013021001. The next prime is 12013021037. The reversal of 12013021021 is 12012031021.

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 12013021021 - 2⁵ = 12013020989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12013020992 and 12013021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013021001) 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, 7262185 + ... + 7263838.

It is an arithmetic number, because the mean of its divisors is an integer number (3006886968).

Almost surely, 2^12013021021 is an apocalyptic number.

It is an amenable number.

12013021021 is a deficient number, since it is larger than the sum of its proper divisors (14526851).

12013021021 is an equidigital number, since it uses as much as digits as its factorization.

12013021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14526850.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 12013021021 its reverse (12012031021), we get a palindrome (24025052042).

The spelling of 12013021021 in words is "twelve billion, thirteen million, twenty-one thousand, twenty-one".