13122420635 has 4 divisors (see below), whose sum is σ = 15746904768. Its totient is φ = 10497936504.

The previous prime is 13122420617. The next prime is 13122420653. The reversal of 13122420635 is 53602422131.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (13122420617) and next prime (13122420653).

It is a cyclic number.

It is not a de Polignac number, because 13122420635 - 2⁸ = 13122420379 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13122420598 and 13122420607.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1312242059 + ... + 1312242068.

It is an arithmetic number, because the mean of its divisors is an integer number (3936726192).

Almost surely, 2^13122420635 is an apocalyptic number.

13122420635 is a deficient number, since it is larger than the sum of its proper divisors (2624484133).

13122420635 is an equidigital number, since it uses as much as digits as its factorization.

13122420635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2624484132.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 13122420635 its reverse (53602422131), we get a palindrome (66724842766).

The spelling of 13122420635 in words is "thirteen billion, one hundred twenty-two million, four hundred twenty thousand, six hundred thirty-five".