12210012210121 has 4 divisors (see below), whose sum is σ = 13320013320144. Its totient is φ = 11100011100100.

The previous prime is 12210012210059. The next prime is 12210012210157. The reversal of 12210012210121 is 12101221001221.

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 12210012210121 - 2⁹ = 12210012209609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12210012210095 and 12210012210104.

It is not an unprimeable number, because it can be changed into a prime (12210012210161) 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, 555000554995 + ... + 555000555016.

It is an arithmetic number, because the mean of its divisors is an integer number (3330003330036).

Almost surely, 2^{12210012210121} is an apocalyptic number.

12210012210121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12210012210121 is a deficient number, since it is larger than the sum of its proper divisors (1110001110023).

12210012210121 is a wasteful number, since it uses less digits than its factorization.

12210012210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110001110022.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12210012210121 its reverse (12101221001221), we get a palindrome (24311233211342).

The spelling of 12210012210121 in words is "twelve trillion, two hundred ten billion, twelve million, two hundred ten thousand, one hundred twenty-one".