12254421205 has 16 divisors (see below), whose sum is σ = 15863977584. Its totient is φ = 9033707520.

The previous prime is 12254421199. The next prime is 12254421209. The reversal of 12254421205 is 50212445221.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 361646289 + 11892774916 = 19017^2 + 109054^2 .

It is not a de Polignac number, because 12254421205 - 2³ = 12254421197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12254421209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125866 + ... + 200875.

It is an arithmetic number, because the mean of its divisors is an integer number (991498599).

Almost surely, 2^12254421205 is an apocalyptic number.

It is an amenable number.

12254421205 is a deficient number, since it is larger than the sum of its proper divisors (3609556379).

12254421205 is a wasteful number, since it uses less digits than its factorization.

12254421205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327336.

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 12254421205 its reverse (50212445221), we get a palindrome (62466866426).

The spelling of 12254421205 in words is "twelve billion, two hundred fifty-four million, four hundred twenty-one thousand, two hundred five".