11112110021 has 2 divisors, whose sum is σ = 11112110022. Its totient is φ = 11112110020.

The previous prime is 11112110017. The next prime is 11112110057. The reversal of 11112110021 is 12001121111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8291013025 + 2821096996 = 91055^2 + 53114^2 .

It is a cyclic number.

It is not a de Polignac number, because 11112110021 - 2² = 11112110017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11112109984 and 11112110011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11112110011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556055010 + 5556055011.

It is an arithmetic number, because the mean of its divisors is an integer number (5556055011).

Almost surely, 2^11112110021 is an apocalyptic number.

It is an amenable number.

11112110021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112110021 is an equidigital number, since it uses as much as digits as its factorization.

11112110021 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 11.

Adding to 11112110021 its reverse (12001121111), we get a palindrome (23113231132).

The spelling of 11112110021 in words is "eleven billion, one hundred twelve million, one hundred ten thousand, twenty-one".