12135136351 has 4 divisors (see below), whose sum is σ = 13068608392. Its totient is φ = 11201664312.

The previous prime is 12135136337. The next prime is 12135136357. The reversal of 12135136351 is 15363153121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15363153121 = 31123 ⋅493627.

It is a cyclic number.

It is not a de Polignac number, because 12135136351 - 2⁵ = 12135136319 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 (12135136357) 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, 466736001 + ... + 466736026.

It is an arithmetic number, because the mean of its divisors is an integer number (3267152098).

Almost surely, 2^12135136351 is an apocalyptic number.

12135136351 is a deficient number, since it is larger than the sum of its proper divisors (933472041).

12135136351 is an equidigital number, since it uses as much as digits as its factorization.

12135136351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933472040.

The product of its digits is 8100, while the sum is 31.

Adding to 12135136351 its reverse (15363153121), we get a palindrome (27498289472).

The spelling of 12135136351 in words is "twelve billion, one hundred thirty-five million, one hundred thirty-six thousand, three hundred fifty-one".