12205004121 has 12 divisors (see below), whose sum is σ = 17718043200. Its totient is φ = 8095780440.

The previous prime is 12205004111. The next prime is 12205004129. The reversal of 12205004121 is 12140050221.

12205004121 is a `hidden beast` number, since 122 + 0 + 500 + 41 + 2 + 1 = 666.

It is not a de Polignac number, because 12205004121 - 2⁶ = 12205004057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12205004094 and 12205004103.

It is not an unprimeable number, because it can be changed into a prime (12205004129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3405525 + ... + 3409106.

It is an arithmetic number, because the mean of its divisors is an integer number (1476503600).

Almost surely, 2^12205004121 is an apocalyptic number.

It is an amenable number.

12205004121 is a deficient number, since it is larger than the sum of its proper divisors (5513039079).

12205004121 is a wasteful number, since it uses less digits than its factorization.

12205004121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6814836 (or 6814833 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 12205004121 its reverse (12140050221), we get a palindrome (24345054342).

The spelling of 12205004121 in words is "twelve billion, two hundred five million, four thousand, one hundred twenty-one".