12022020121 has 4 divisors (see below), whose sum is σ = 12544716672. Its totient is φ = 11499323572.

The previous prime is 12022020103. The next prime is 12022020133. The reversal of 12022020121 is 12102022021.

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 not a de Polignac number, because 12022020121 - 2⁹ = 12022019609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12022020421) 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, 261348241 + ... + 261348286.

It is an arithmetic number, because the mean of its divisors is an integer number (3136179168).

Almost surely, 2^12022020121 is an apocalyptic number.

It is an amenable number.

12022020121 is a deficient number, since it is larger than the sum of its proper divisors (522696551).

12022020121 is an equidigital number, since it uses as much as digits as its factorization.

12022020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522696550.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12022020121 its reverse (12102022021), we get a palindrome (24124042142).

The spelling of 12022020121 in words is "twelve billion, twenty-two million, twenty thousand, one hundred twenty-one".