12205551131 has 4 divisors (see below), whose sum is σ = 12208362000. Its totient is φ = 12202740264.

The previous prime is 12205551109. The next prime is 12205551143. The reversal of 12205551131 is 13115550221.

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

It is a cyclic number.

It is not a de Polignac number, because 12205551131 - 2⁶ = 12205551067 is a prime.

It is a super-2 number, since 2×12205551131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12205551131.

It is not an unprimeable number, because it can be changed into a prime (12205551331) 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, 1398911 + ... + 1407608.

It is an arithmetic number, because the mean of its divisors is an integer number (3052090500).

Almost surely, 2^12205551131 is an apocalyptic number.

12205551131 is a deficient number, since it is larger than the sum of its proper divisors (2810869).

12205551131 is an equidigital number, since it uses as much as digits as its factorization.

12205551131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2810868.

The product of its (nonzero) digits is 1500, while the sum is 26.

The spelling of 12205551131 in words is "twelve billion, two hundred five million, five hundred fifty-one thousand, one hundred thirty-one".