1200012101111 has 4 divisors (see below), whose sum is σ = 1200580021872. Its totient is φ = 1199444180352.

The previous prime is 1200012101081. The next prime is 1200012101177. The reversal of 1200012101111 is 1111012100021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200012101111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200012101092 and 1200012101101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200012103111) 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 in 3 ways as a sum of consecutive naturals, for example, 283957211 + ... + 283961436.

It is an arithmetic number, because the mean of its divisors is an integer number (300145005468).

Almost surely, 2^{1200012101111} is an apocalyptic number.

1200012101111 is a deficient number, since it is larger than the sum of its proper divisors (567920761).

1200012101111 is an equidigital number, since it uses as much as digits as its factorization.

1200012101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567920760.

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

Adding to 1200012101111 its reverse (1111012100021), we get a palindrome (2311024201132).

The spelling of 1200012101111 in words is "one trillion, two hundred billion, twelve million, one hundred one thousand, one hundred eleven".