13365025121 has 4 divisors (see below), whose sum is σ = 15274314432. Its totient is φ = 11455735812.

The previous prime is 13365025067. The next prime is 13365025169. The reversal of 13365025121 is 12152056331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12152056331 = 17 ⋅714826843.

It is a cyclic number.

It is not a de Polignac number, because 13365025121 - 2¹⁰ = 13365024097 is a prime.

It is a super-2 number, since 2×13365025121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13365027121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 954644645 + ... + 954644658.

It is an arithmetic number, because the mean of its divisors is an integer number (3818578608).

Almost surely, 2^13365025121 is an apocalyptic number.

It is an amenable number.

13365025121 is a deficient number, since it is larger than the sum of its proper divisors (1909289311).

13365025121 is an equidigital number, since it uses as much as digits as its factorization.

13365025121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909289310.

The product of its (nonzero) digits is 5400, while the sum is 29.

The spelling of 13365025121 in words is "thirteen billion, three hundred sixty-five million, twenty-five thousand, one hundred twenty-one".