111211000001111 has 4 divisors (see below), whose sum is σ = 111501368147712. Its totient is φ = 110920631854512.

The previous prime is 111211000001093. The next prime is 111211000001117. The reversal of 111211000001111 is 111100000112111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111211000001111 is a prime.

It is a super-2 number, since 2×111211000001111² (a number of 29 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 = 111211000001092 and 111211000001101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111211000001117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145184072726 + ... + 145184073491.

It is an arithmetic number, because the mean of its divisors is an integer number (27875342036928).

Almost surely, 2^{111211000001111} is an apocalyptic number.

111211000001111 is a deficient number, since it is larger than the sum of its proper divisors (290368146601).

111211000001111 is an equidigital number, since it uses as much as digits as its factorization.

111211000001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290368146600.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 111211000001111 its reverse (111100000112111), we get a palindrome (222311000113222).

The spelling of 111211000001111 in words is "one hundred eleven trillion, two hundred eleven billion, one thousand, one hundred eleven".