12355135414621 has 4 divisors (see below), whose sum is σ = 12382170722332. Its totient is φ = 12328100106912.

The previous prime is 12355135414597. The next prime is 12355135414649. The reversal of 12355135414621 is 12641453155321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8987488351396 + 3367647063225 = 2997914^2 + 1835115^2 .

It is a cyclic number.

It is not a de Polignac number, because 12355135414621 - 2⁷ = 12355135414493 is a prime.

It is a super-2 number, since 2×12355135414621² (a number of 27 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 (12355135412621) 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, 13517653170 + ... + 13517654083.

It is an arithmetic number, because the mean of its divisors is an integer number (3095542680583).

Almost surely, 2^{12355135414621} is an apocalyptic number.

It is an amenable number.

12355135414621 is a deficient number, since it is larger than the sum of its proper divisors (27035307711).

12355135414621 is an equidigital number, since it uses as much as digits as its factorization.

12355135414621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27035307710.

The product of its digits is 432000, while the sum is 43.

Adding to 12355135414621 its reverse (12641453155321), we get a palindrome (24996588569942).

The spelling of 12355135414621 in words is "twelve trillion, three hundred fifty-five billion, one hundred thirty-five million, four hundred fourteen thousand, six hundred twenty-one".