12855831211 has 4 divisors (see below), whose sum is σ = 12902242432. Its totient is φ = 12809419992.

The previous prime is 12855831203. The next prime is 12855831253. The reversal of 12855831211 is 11213855821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11213855821 = 7 ⋅1601979403.

It is a cyclic number.

It is not a de Polignac number, because 12855831211 - 2³ = 12855831203 is a prime.

It is a super-2 number, since 2×12855831211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12855871211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23205195 + ... + 23205748.

It is an arithmetic number, because the mean of its divisors is an integer number (3225560608).

Almost surely, 2^12855831211 is an apocalyptic number.

12855831211 is a deficient number, since it is larger than the sum of its proper divisors (46411221).

12855831211 is an equidigital number, since it uses as much as digits as its factorization.

12855831211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46411220.

The product of its digits is 19200, while the sum is 37.

The spelling of 12855831211 in words is "twelve billion, eight hundred fifty-five million, eight hundred thirty-one thousand, two hundred eleven".