13154312434421 has 2 divisors, whose sum is σ = 13154312434422. Its totient is φ = 13154312434420.

The previous prime is 13154312434387. The next prime is 13154312434451. The reversal of 13154312434421 is 12443421345131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11243044894225 + 1911267540196 = 3353065^2 + 1382486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13154312434421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13154312434451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6577156217210 + 6577156217211.

It is an arithmetic number, because the mean of its divisors is an integer number (6577156217211).

Almost surely, 2^{13154312434421} is an apocalyptic number.

It is an amenable number.

13154312434421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13154312434421 is an equidigital number, since it uses as much as digits as its factorization.

13154312434421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 38.

Adding to 13154312434421 its reverse (12443421345131), we get a palindrome (25597733779552).

The spelling of 13154312434421 in words is "thirteen trillion, one hundred fifty-four billion, three hundred twelve million, four hundred thirty-four thousand, four hundred twenty-one".