12210202213121 has 4 divisors (see below), whose sum is σ = 13320220596144. Its totient is φ = 11100183830100.

The previous prime is 12210202213109. The next prime is 12210202213163. The reversal of 12210202213121 is 12131220201221.

12210202213121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12210202213121 - 2²⁶ = 12210135104257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12210202213093 and 12210202213102.

It is not an unprimeable number, because it can be changed into a prime (12210202210121) 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, 555009191495 + ... + 555009191516.

It is an arithmetic number, because the mean of its divisors is an integer number (3330055149036).

Almost surely, 2^{12210202213121} is an apocalyptic number.

12210202213121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12210202213121 is a deficient number, since it is larger than the sum of its proper divisors (1110018383023).

12210202213121 is a wasteful number, since it uses less digits than its factorization.

12210202213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110018383022.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 12210202213121 its reverse (12131220201221), we get a palindrome (24341422414342).

The spelling of 12210202213121 in words is "twelve trillion, two hundred ten billion, two hundred two million, two hundred thirteen thousand, one hundred twenty-one".