12210120222121 has 4 divisors (see below), whose sum is σ = 12631158850500. Its totient is φ = 11789081593744.

The previous prime is 12210120222107. The next prime is 12210120222199. The reversal of 12210120222121 is 12122202101221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3936236160025 + 8273884062096 = 1983995^2 + 2876436^2 .

It is a cyclic number.

It is not a de Polignac number, because 12210120222121 - 2⁷ = 12210120221993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12210120223121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210519314146 + ... + 210519314203.

It is an arithmetic number, because the mean of its divisors is an integer number (3157789712625).

Almost surely, 2^{12210120222121} is an apocalyptic number.

It is an amenable number.

12210120222121 is a deficient number, since it is larger than the sum of its proper divisors (421038628379).

12210120222121 is an equidigital number, since it uses as much as digits as its factorization.

12210120222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421038628378.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12210120222121 its reverse (12122202101221), we get a palindrome (24332322323342).

The spelling of 12210120222121 in words is "twelve trillion, two hundred ten billion, one hundred twenty million, two hundred twenty-two thousand, one hundred twenty-one".