11111210011111 has 16 divisors (see below), whose sum is σ = 12767461406784. Its totient is φ = 9472216817664.

The previous prime is 11111210011093. The next prime is 11111210011201. The reversal of 11111210011111 is 11111001211111.

It is a cyclic number.

It is not a de Polignac number, because 11111210011111 - 2⁷ = 11111210010983 is a prime.

It is a super-2 number, since 2×11111210011111² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11111210011091 and 11111210011100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111210041111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4492995 + ... + 6512251.

It is an arithmetic number, because the mean of its divisors is an integer number (797966337924).

Almost surely, 2^{11111210011111} is an apocalyptic number.

11111210011111 is a deficient number, since it is larger than the sum of its proper divisors (1656251395673).

11111210011111 is a wasteful number, since it uses less digits than its factorization.

11111210011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2023530.

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

Adding to 11111210011111 its reverse (11111001211111), we get a palindrome (22222211222222).

The spelling of 11111210011111 in words is "eleven trillion, one hundred eleven billion, two hundred ten million, eleven thousand, one hundred eleven".