12051633661 has 2 divisors, whose sum is σ = 12051633662. Its totient is φ = 12051633660.

The previous prime is 12051633611. The next prime is 12051633677. The reversal of 12051633661 is 16633615021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9999000025 + 2052633636 = 99995^2 + 45306^2 .

It is an emirp because it is prime and its reverse (16633615021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12051633661 - 2⁷ = 12051633533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12051633611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6025816830 + 6025816831.

It is an arithmetic number, because the mean of its divisors is an integer number (6025816831).

Almost surely, 2^12051633661 is an apocalyptic number.

It is an amenable number.

12051633661 is a deficient number, since it is larger than the sum of its proper divisors (1).

12051633661 is an equidigital number, since it uses as much as digits as its factorization.

12051633661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 34.

The spelling of 12051633661 in words is "twelve billion, fifty-one million, six hundred thirty-three thousand, six hundred sixty-one".