12354403121 has 2 divisors, whose sum is σ = 12354403122. Its totient is φ = 12354403120.

The previous prime is 12354403111. The next prime is 12354403147. The reversal of 12354403121 is 12130445321.

It is a happy number.

It is an a-pointer prime, because the next prime (12354403147) can be obtained adding 12354403121 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12170502400 + 183900721 = 110320^2 + 13561^2 .

It is a cyclic number.

It is not a de Polignac number, because 12354403121 - 2³⁰ = 11280661297 is a prime.

It is not a weakly prime, because it can be changed into another prime (12354403111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6177201560 + 6177201561.

It is an arithmetic number, because the mean of its divisors is an integer number (6177201561).

Almost surely, 2^12354403121 is an apocalyptic number.

It is an amenable number.

12354403121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12354403121 is an equidigital number, since it uses as much as digits as its factorization.

12354403121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 12354403121 its reverse (12130445321), we get a palindrome (24484848442).

The spelling of 12354403121 in words is "twelve billion, three hundred fifty-four million, four hundred three thousand, one hundred twenty-one".