1001200043 has 2 divisors, whose sum is σ = 1001200044. Its totient is φ = 1001200042.

The previous prime is 1001200019. The next prime is 1001200049. The reversal of 1001200043 is 3400021001.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001200043 - 2¹⁰ = 1001199019 is a prime.

It is a super-2 number, since 2×1001200043² = 2004803052206403698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1001199997 and 1001200033.

It is not a weakly prime, because it can be changed into another prime (1001200049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500600021 + 500600022.

It is an arithmetic number, because the mean of its divisors is an integer number (500600022).

Almost surely, 2^1001200043 is an apocalyptic number.

1001200043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001200043 is an equidigital number, since it uses as much as digits as its factorization.

1001200043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1001200043 is about 31641.7452584398. The cubic root of 1001200043 is about 1000.3998544285.

Adding to 1001200043 its reverse (3400021001), we get a palindrome (4401221044).

The spelling of 1001200043 in words is "one billion, one million, two hundred thousand, forty-three".