1200543011 has 2 divisors, whose sum is σ = 1200543012. Its totient is φ = 1200543010.

The previous prime is 1200542999. The next prime is 1200543041. The reversal of 1200543011 is 1103450021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1200543011 - 2³⁰ = 126801187 is a prime.

It is a super-2 number, since 2×1200543011² = 2882607042521892242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1200543041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600271505 + 600271506.

It is an arithmetic number, because the mean of its divisors is an integer number (600271506).

Almost surely, 2^1200543011 is an apocalyptic number.

1200543011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200543011 is an equidigital number, since it uses as much as digits as its factorization.

1200543011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1200543011 is about 34648.8529535972. The cubic root of 1200543011 is about 1062.8188325927.

Adding to 1200543011 its reverse (1103450021), we get a palindrome (2303993032).

The spelling of 1200543011 in words is "one billion, two hundred million, five hundred forty-three thousand, eleven".