1011220012111 has 2 divisors, whose sum is σ = 1011220012112. Its totient is φ = 1011220012110.

The previous prime is 1011220012097. The next prime is 1011220012207. The reversal of 1011220012111 is 1112100221101.

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-1011220012111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011220012091 and 1011220012100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011220012711) 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 as a sum of consecutive naturals, namely, 505610006055 + 505610006056.

It is an arithmetic number, because the mean of its divisors is an integer number (505610006056).

Almost surely, 2^{1011220012111} is an apocalyptic number.

1011220012111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011220012111 is an equidigital number, since it uses as much as digits as its factorization.

1011220012111 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1011220012111 its reverse (1112100221101), we get a palindrome (2123320233212).

The spelling of 1011220012111 in words is "one trillion, eleven billion, two hundred twenty million, twelve thousand, one hundred eleven".