1111211011111 has 8 divisors (see below), whose sum is σ = 1116421877648. Its totient is φ = 1106005104000.

The previous prime is 1111211011109. The next prime is 1111211011123. The reversal of 1111211011111 is 1111101121111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1111211011111 - 2¹ = 1111211011109 is a prime.

It is a super-2 number, since 2×1111211011111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111211011091 and 1111211011100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111211011151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 790305 + ... + 1687306.

It is an arithmetic number, because the mean of its divisors is an integer number (139552734706).

Almost surely, 2^{1111211011111} is an apocalyptic number.

1111211011111 is a deficient number, since it is larger than the sum of its proper divisors (5210866537).

1111211011111 is a wasteful number, since it uses less digits than its factorization.

1111211011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2479713.

The product of its (nonzero) digits is 2, while the sum is 13.

Adding to 1111211011111 its reverse (1111101121111), we get a palindrome (2222312132222).

The spelling of 1111211011111 in words is "one trillion, one hundred eleven billion, two hundred eleven million, eleven thousand, one hundred eleven".