1011231223111 has 2 divisors, whose sum is σ = 1011231223112. Its totient is φ = 1011231223110.

The previous prime is 1011231223099. The next prime is 1011231223117. The reversal of 1011231223111 is 1113221321101.

It is a strong prime.

It is an emirp because it is prime and its reverse (1113221321101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1011231223111 - 2¹⁹ = 1011230698823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011231223117) 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, 505615611555 + 505615611556.

It is an arithmetic number, because the mean of its divisors is an integer number (505615611556).

Almost surely, 2^{1011231223111} is an apocalyptic number.

1011231223111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011231223111 is an equidigital number, since it uses as much as digits as its factorization.

1011231223111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1011231223111 its reverse (1113221321101), we get a palindrome (2124452544212).

The spelling of 1011231223111 in words is "one trillion, eleven billion, two hundred thirty-one million, two hundred twenty-three thousand, one hundred eleven".