12355420511 has 12 divisors (see below), whose sum is σ = 14376948120. Its totient is φ = 10587180240.

The previous prime is 12355420477. The next prime is 12355420541. The reversal of 12355420511 is 11502455321.

It is not a de Polignac number, because 12355420511 - 2⁶ = 12355420447 is a prime.

It is a super-2 number, since 2×12355420511² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12355420541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134945 + ... + 207173.

It is an arithmetic number, because the mean of its divisors is an integer number (1198079010).

Almost surely, 2^12355420511 is an apocalyptic number.

12355420511 is a deficient number, since it is larger than the sum of its proper divisors (2021527609).

12355420511 is an equidigital number, since it uses as much as digits as its factorization.

12355420511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75734 (or 75727 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 12355420511 its reverse (11502455321), we get a palindrome (23857875832).

The spelling of 12355420511 in words is "twelve billion, three hundred fifty-five million, four hundred twenty thousand, five hundred eleven".