12155522413 has 4 divisors (see below), whose sum is σ = 12158329500. Its totient is φ = 12152715328.

The previous prime is 12155522341. The next prime is 12155522419. The reversal of 12155522413 is 31422555121.

12155522413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31422555121 = 57601 ⋅545521.

It can be written as a sum of positive squares in 2 ways, for example, as 70257924 + 12085264489 = 8382^2 + 109933^2 .

It is a cyclic number.

It is not a de Polignac number, because 12155522413 - 2¹³ = 12155514221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155522419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1397038 + ... + 1405711.

It is an arithmetic number, because the mean of its divisors is an integer number (3039582375).

Almost surely, 2^12155522413 is an apocalyptic number.

It is an amenable number.

12155522413 is a deficient number, since it is larger than the sum of its proper divisors (2807087).

12155522413 is an equidigital number, since it uses as much as digits as its factorization.

12155522413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2807086.

The product of its digits is 12000, while the sum is 31.

The spelling of 12155522413 in words is "twelve billion, one hundred fifty-five million, five hundred twenty-two thousand, four hundred thirteen".