13445551155121 has 2 divisors, whose sum is σ = 13445551155122. Its totient is φ = 13445551155120.

The previous prime is 13445551155017. The next prime is 13445551155149. The reversal of 13445551155121 is 12155115554431.

13445551155121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8416027279521 + 5029523875600 = 2901039^2 + 2242660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13445551155121 is a prime.

It is not a weakly prime, because it can be changed into another prime (13445551155151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6722775577560 + 6722775577561.

It is an arithmetic number, because the mean of its divisors is an integer number (6722775577561).

Almost surely, 2^{13445551155121} is an apocalyptic number.

It is an amenable number.

13445551155121 is a deficient number, since it is larger than the sum of its proper divisors (1).

13445551155121 is an equidigital number, since it uses as much as digits as its factorization.

13445551155121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 300000, while the sum is 43.

The spelling of 13445551155121 in words is "thirteen trillion, four hundred forty-five billion, five hundred fifty-one million, one hundred fifty-five thousand, one hundred twenty-one".