13451224121 has 2 divisors, whose sum is σ = 13451224122. Its totient is φ = 13451224120.

The previous prime is 13451224081. The next prime is 13451224223. The reversal of 13451224121 is 12142215431.

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., 9768554896 + 3682669225 = 98836^2 + 60685^2 .

It is an emirp because it is prime and its reverse (12142215431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13451224121 - 2⁶ = 13451224057 is a prime.

It is not a weakly prime, because it can be changed into another prime (13451224621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6725612060 + 6725612061.

It is an arithmetic number, because the mean of its divisors is an integer number (6725612061).

Almost surely, 2^13451224121 is an apocalyptic number.

It is an amenable number.

13451224121 is a deficient number, since it is larger than the sum of its proper divisors (1).

13451224121 is an equidigital number, since it uses as much as digits as its factorization.

13451224121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 26.

Adding to 13451224121 its reverse (12142215431), we get a palindrome (25593439552).

The spelling of 13451224121 in words is "thirteen billion, four hundred fifty-one million, two hundred twenty-four thousand, one hundred twenty-one".