12842536121 has 4 divisors (see below), whose sum is σ = 12843134544. Its totient is φ = 12841937700.

The previous prime is 12842536111. The next prime is 12842536141. The reversal of 12842536121 is 12163524821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12842536121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12842536111) 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, 265775 + ... + 310356.

It is an arithmetic number, because the mean of its divisors is an integer number (3210783636).

Almost surely, 2^12842536121 is an apocalyptic number.

It is an amenable number.

12842536121 is a deficient number, since it is larger than the sum of its proper divisors (598423).

12842536121 is an equidigital number, since it uses as much as digits as its factorization.

12842536121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598422.

The product of its digits is 23040, while the sum is 35.

The spelling of 12842536121 in words is "twelve billion, eight hundred forty-two million, five hundred thirty-six thousand, one hundred twenty-one".