1011111200111 has 16 divisors (see below), whose sum is σ = 1023191161344. Its totient is φ = 999110083104.

The previous prime is 1011111200093. The next prime is 1011111200117. The reversal of 1011111200111 is 1110021111101.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011111200111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011111200092 and 1011111200101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011111200117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49537070 + ... + 49557476.

It is an arithmetic number, because the mean of its divisors is an integer number (63949447584).

Almost surely, 2^{1011111200111} is an apocalyptic number.

1011111200111 is a deficient number, since it is larger than the sum of its proper divisors (12079961233).

1011111200111 is a wasteful number, since it uses less digits than its factorization.

1011111200111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22310.

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

Adding to 1011111200111 its reverse (1110021111101), we get a palindrome (2121132311212).

The spelling of 1011111200111 in words is "one trillion, eleven billion, one hundred eleven million, two hundred thousand, one hundred eleven".