11111011021111 has 2 divisors, whose sum is σ = 11111011021112. Its totient is φ = 11111011021110.

The previous prime is 11111011020971. The next prime is 11111011021141. The reversal of 11111011021111 is 11112011011111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11111011021111 - 2¹³ = 11111011012919 is a prime.

It is a super-2 number, since 2×11111011021111² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11111011021091 and 11111011021100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111011021141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555505510555 + 5555505510556.

It is an arithmetic number, because the mean of its divisors is an integer number (5555505510556).

Almost surely, 2^{11111011021111} is an apocalyptic number.

11111011021111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111011021111 is an equidigital number, since it uses as much as digits as its factorization.

11111011021111 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 13.

Adding to 11111011021111 its reverse (11112011011111), we get a palindrome (22223022032222).

The spelling of 11111011021111 in words is "eleven trillion, one hundred eleven billion, eleven million, twenty-one thousand, one hundred eleven".