13212211121 has 2 divisors, whose sum is σ = 13212211122. Its totient is φ = 13212211120.

The previous prime is 13212211097. The next prime is 13212211153. The reversal of 13212211121 is 12111221231.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8342264896 + 4869946225 = 91336^2 + 69785^2 .

It is an emirp because it is prime and its reverse (12111221231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13212211121 - 2²² = 13208016817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13212211121.

It is not a weakly prime, because it can be changed into another prime (13212211171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6606105560 + 6606105561.

It is an arithmetic number, because the mean of its divisors is an integer number (6606105561).

Almost surely, 2^13212211121 is an apocalyptic number.

It is an amenable number.

13212211121 is a deficient number, since it is larger than the sum of its proper divisors (1).

13212211121 is an equidigital number, since it uses as much as digits as its factorization.

13212211121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48, while the sum is 17.

Adding to 13212211121 its reverse (12111221231), we get a palindrome (25323432352).

The spelling of 13212211121 in words is "thirteen billion, two hundred twelve million, two hundred eleven thousand, one hundred twenty-one".