111121211011 has 2 divisors, whose sum is σ = 111121211012. Its totient is φ = 111121211010.

The previous prime is 111121210973. The next prime is 111121211057. The reversal of 111121211011 is 110112121111.

It is a weak prime.

It is an emirp because it is prime and its reverse (110112121111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111121211011 - 2⁷ = 111121210883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111121210982 and 111121211000.

It is not a weakly prime, because it can be changed into another prime (111121211911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560605505 + 55560605506.

It is an arithmetic number, because the mean of its divisors is an integer number (55560605506).

Almost surely, 2^111121211011 is an apocalyptic number.

111121211011 is a deficient number, since it is larger than the sum of its proper divisors (1).

111121211011 is an equidigital number, since it uses as much as digits as its factorization.

111121211011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 111121211011 its reverse (110112121111), we get a palindrome (221233332122).

The spelling of 111121211011 in words is "one hundred eleven billion, one hundred twenty-one million, two hundred eleven thousand, eleven".