12020221001 has 4 divisors (see below), whose sum is σ = 12275970432. Its totient is φ = 11764471572.

The previous prime is 12020220959. The next prime is 12020221027. The reversal of 12020221001 is 10012202021.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-12020221001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12020221901) 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, 127874645 + ... + 127874738.

It is an arithmetic number, because the mean of its divisors is an integer number (3068992608).

Almost surely, 2^12020221001 is an apocalyptic number.

It is an amenable number.

12020221001 is a deficient number, since it is larger than the sum of its proper divisors (255749431).

12020221001 is an equidigital number, since it uses as much as digits as its factorization.

12020221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255749430.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12020221001 its reverse (10012202021), we get a palindrome (22032423022).

The spelling of 12020221001 in words is "twelve billion, twenty million, two hundred twenty-one thousand, one".