12205556011 has 32 divisors (see below), whose sum is σ = 14324014080. Its totient is φ = 10277030400.

The previous prime is 12205555997. The next prime is 12205556021. The reversal of 12205556011 is 11065550221.

It is not a de Polignac number, because 12205556011 - 2¹⁹ = 12205031723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12205556021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5125041 + ... + 5127421.

It is an arithmetic number, because the mean of its divisors is an integer number (447625440).

Almost surely, 2^12205556011 is an apocalyptic number.

12205556011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12205556011 is a deficient number, since it is larger than the sum of its proper divisors (2118458069).

12205556011 is a wasteful number, since it uses less digits than its factorization.

12205556011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2835.

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 12205556011 in words is "twelve billion, two hundred five million, five hundred fifty-six thousand, eleven".