12021042643 has 2 divisors, whose sum is σ = 12021042644. Its totient is φ = 12021042642.

The previous prime is 12021042623. The next prime is 12021042647. The reversal of 12021042643 is 34624012021.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12021042643 is a prime.

It is not a weakly prime, because it can be changed into another prime (12021042647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010521321 + 6010521322.

It is an arithmetic number, because the mean of its divisors is an integer number (6010521322).

Almost surely, 2^12021042643 is an apocalyptic number.

12021042643 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021042643 is an equidigital number, since it uses as much as digits as its factorization.

12021042643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 12021042643 its reverse (34624012021), we get a palindrome (46645054664).

The spelling of 12021042643 in words is "twelve billion, twenty-one million, forty-two thousand, six hundred forty-three".