13222131121 has 2 divisors, whose sum is σ = 13222131122. Its totient is φ = 13222131120.

The previous prime is 13222131113. The next prime is 13222131137. The reversal of 13222131121 is 12113122231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7379669025 + 5842462096 = 85905^2 + 76436^2 .

It is a cyclic number.

It is not a de Polignac number, because 13222131121 - 2³ = 13222131113 is a prime.

It is not a weakly prime, because it can be changed into another prime (13222131151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6611065560 + 6611065561.

It is an arithmetic number, because the mean of its divisors is an integer number (6611065561).

Almost surely, 2^13222131121 is an apocalyptic number.

It is an amenable number.

13222131121 is a deficient number, since it is larger than the sum of its proper divisors (1).

13222131121 is an equidigital number, since it uses as much as digits as its factorization.

13222131121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 19.

Adding to 13222131121 its reverse (12113122231), we get a palindrome (25335253352).

The spelling of 13222131121 in words is "thirteen billion, two hundred twenty-two million, one hundred thirty-one thousand, one hundred twenty-one".