1200111201011 has 2 divisors, whose sum is σ = 1200111201012. Its totient is φ = 1200111201010.

The previous prime is 1200111200989. The next prime is 1200111201071. The reversal of 1200111201011 is 1101021110021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1200111201011 - 2³⁸ = 925233294067 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200111200983 and 1200111201001.

It is not a weakly prime, because it can be changed into another prime (1200111201071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600055600505 + 600055600506.

It is an arithmetic number, because the mean of its divisors is an integer number (600055600506).

Almost surely, 2^{1200111201011} is an apocalyptic number.

1200111201011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200111201011 is an equidigital number, since it uses as much as digits as its factorization.

1200111201011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1200111201011 its reverse (1101021110021), we get a palindrome (2301132311032).

The spelling of 1200111201011 in words is "one trillion, two hundred billion, one hundred eleven million, two hundred one thousand, eleven".