12210120121 has 4 divisors (see below), whose sum is σ = 12211663744. Its totient is φ = 12208576500.

The previous prime is 12210120113. The next prime is 12210120127. The reversal of 12210120121 is 12102101221.

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 12210120121 - 2³ = 12210120113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12210120127) 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, 759885 + ... + 775786.

It is an arithmetic number, because the mean of its divisors is an integer number (3052915936).

Almost surely, 2^12210120121 is an apocalyptic number.

It is an amenable number.

12210120121 is a deficient number, since it is larger than the sum of its proper divisors (1543623).

12210120121 is an equidigital number, since it uses as much as digits as its factorization.

12210120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543622.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12210120121 its reverse (12102101221), we get a palindrome (24312221342).

The spelling of 12210120121 in words is "twelve billion, two hundred ten million, one hundred twenty thousand, one hundred twenty-one".