1200111101111 has 6 divisors (see below), whose sum is σ = 1299528588960. Its totient is φ = 1107794862408.

The previous prime is 1200111101087. The next prime is 1200111101131. The reversal of 1200111101111 is 1111011110021.

It is a happy number.

It is not a de Polignac number, because 1200111101111 - 2²⁶ = 1200043992247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200111101092 and 1200111101101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200111101131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3550624391 + ... + 3550624728.

It is an arithmetic number, because the mean of its divisors is an integer number (216588098160).

Almost surely, 2^{1200111101111} is an apocalyptic number.

1200111101111 is a deficient number, since it is larger than the sum of its proper divisors (99417487849).

1200111101111 is an equidigital number, since it uses as much as digits as its factorization.

1200111101111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7101249145 (or 7101249132 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 1200111101111 its reverse (1111011110021), we get a palindrome (2311122211132).

The spelling of 1200111101111 in words is "one trillion, two hundred billion, one hundred eleven million, one hundred one thousand, one hundred eleven".