12021297643 has 2 divisors, whose sum is σ = 12021297644. Its totient is φ = 12021297642.

The previous prime is 12021297523. The next prime is 12021297647. The reversal of 12021297643 is 34679212021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12021297643 - 2¹³ = 12021289451 is a prime.

It is not a weakly prime, because it can be changed into another prime (12021297647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010648821 + 6010648822.

It is an arithmetic number, because the mean of its divisors is an integer number (6010648822).

Almost surely, 2^12021297643 is an apocalyptic number.

12021297643 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021297643 is an equidigital number, since it uses as much as digits as its factorization.

12021297643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 12021297643 in words is "twelve billion, twenty-one million, two hundred ninety-seven thousand, six hundred forty-three".