1011211001111 has 2 divisors, whose sum is σ = 1011211001112. Its totient is φ = 1011211001110.

The previous prime is 1011211001093. The next prime is 1011211001137. The reversal of 1011211001111 is 1111001121101.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1111001121101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1011211001111 - 2¹⁴ = 1011210984727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011211001092 and 1011211001101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011211001191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505605500555 + 505605500556.

It is an arithmetic number, because the mean of its divisors is an integer number (505605500556).

Almost surely, 2^{1011211001111} is an apocalyptic number.

1011211001111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011211001111 is an equidigital number, since it uses as much as digits as its factorization.

1011211001111 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 1011211001111 its reverse (1111001121101), we get a palindrome (2122212122212).

The spelling of 1011211001111 in words is "one trillion, eleven billion, two hundred eleven million, one thousand, one hundred eleven".