1200111202111 has 12 divisors (see below), whose sum is σ = 1223301494800. Its totient is φ = 1177352616960.

The previous prime is 1200111202079. The next prime is 1200111202123. The reversal of 1200111202111 is 1112021110021.

It is a happy number.

It is not a de Polignac number, because 1200111202111 - 2⁵ = 1200111202079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200111202091 and 1200111202100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200111272111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50687806 + ... + 50711476.

Almost surely, 2^{1200111202111} is an apocalyptic number.

1200111202111 is a deficient number, since it is larger than the sum of its proper divisors (23190292689).

1200111202111 is an equidigital number, since it uses as much as digits as its factorization.

1200111202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41826 (or 41773 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1200111202111 its reverse (1112021110021), we get a palindrome (2312132312132).

The spelling of 1200111202111 in words is "one trillion, two hundred billion, one hundred eleven million, two hundred two thousand, one hundred eleven".