1011211100111 has 2 divisors, whose sum is σ = 1011211100112. Its totient is φ = 1011211100110.

The previous prime is 1011211100101. The next prime is 1011211100173. The reversal of 1011211100111 is 1110011121101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011211100111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011211100092 and 1011211100101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011211100101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505605550055 + 505605550056.

It is an arithmetic number, because the mean of its divisors is an integer number (505605550056).

Almost surely, 2^{1011211100111} is an apocalyptic number.

1011211100111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011211100111 is an equidigital number, since it uses as much as digits as its factorization.

1011211100111 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1011211100111 its reverse (1110011121101), we get a palindrome (2121222221212).

The spelling of 1011211100111 in words is "one trillion, eleven billion, two hundred eleven million, one hundred thousand, one hundred eleven".