12212321101 has 4 divisors (see below), whose sum is σ = 12214518012. Its totient is φ = 12210124192.

The previous prime is 12212320997. The next prime is 12212321111. The reversal of 12212321101 is 10112321221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10112321221 = 41 ⋅246641981.

It can be written as a sum of positive squares in 2 ways, for example, as 192487876 + 12019833225 = 13874^2 + 109635^2 .

It is a cyclic number.

It is not a de Polignac number, because 12212321101 - 2²⁵ = 12178766669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212321111) 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, 1090096 + ... + 1101241.

It is an arithmetic number, because the mean of its divisors is an integer number (3053629503).

Almost surely, 2^12212321101 is an apocalyptic number.

It is an amenable number.

12212321101 is a deficient number, since it is larger than the sum of its proper divisors (2196911).

12212321101 is an equidigital number, since it uses as much as digits as its factorization.

12212321101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2196910.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12212321101 its reverse (10112321221), we get a palindrome (22324642322).

The spelling of 12212321101 in words is "twelve billion, two hundred twelve million, three hundred twenty-one thousand, one hundred one".