12205246305 has 128 divisors (see below), whose sum is σ = 24182737920. Its totient is φ = 5129994240.

The previous prime is 12205246303. The next prime is 12205246307. The reversal of 12205246305 is 50364250221.

It is an interprime number because it is at equal distance from previous prime (12205246303) and next prime (12205246307).

It is not a de Polignac number, because 12205246305 - 2¹ = 12205246303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12205246303) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 21450061 + ... + 21450629.

It is an arithmetic number, because the mean of its divisors is an integer number (188927640).

Almost surely, 2^12205246305 is an apocalyptic number.

12205246305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12205246305 is a deficient number, since it is larger than the sum of its proper divisors (11977491615).

12205246305 is a wasteful number, since it uses less digits than its factorization.

12205246305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 12205246305 its reverse (50364250221), we get a palindrome (62569496526).

The spelling of 12205246305 in words is "twelve billion, two hundred five million, two hundred forty-six thousand, three hundred five".