12205246261 has 8 divisors (see below), whose sum is σ = 13186109720. Its totient is φ = 11230382592.

The previous prime is 12205246243. The next prime is 12205246303. The reversal of 12205246261 is 16264250221.

It can be written as a sum of positive squares in 4 ways, for example, as 292615236 + 11912631025 = 17106^2 + 109145^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12205246261 - 2²¹ = 12203149109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12205246231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1495716 + ... + 1503853.

It is an arithmetic number, because the mean of its divisors is an integer number (1648263715).

Almost surely, 2^12205246261 is an apocalyptic number.

It is an amenable number.

12205246261 is a deficient number, since it is larger than the sum of its proper divisors (980863459).

12205246261 is a wasteful number, since it uses less digits than its factorization.

12205246261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2999895.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 12205246261 its reverse (16264250221), we get a palindrome (28469496482).

The spelling of 12205246261 in words is "twelve billion, two hundred five million, two hundred forty-six thousand, two hundred sixty-one".