111120102110021 has 2 divisors, whose sum is σ = 111120102110022. Its totient is φ = 111120102110020.

The previous prime is 111120102109987. The next prime is 111120102110047. The reversal of 111120102110021 is 120011201021111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82914592005025 + 28205510104996 = 9105745^2 + 5310886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111120102110021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111120102109978 and 111120102110005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111120102110071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560051055010 + 55560051055011.

It is an arithmetic number, because the mean of its divisors is an integer number (55560051055011).

Almost surely, 2^{111120102110021} is an apocalyptic number.

It is an amenable number.

111120102110021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111120102110021 is an equidigital number, since it uses as much as digits as its factorization.

111120102110021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111120102110021 its reverse (120011201021111), we get a palindrome (231131303131132).

The spelling of 111120102110021 in words is "one hundred eleven trillion, one hundred twenty billion, one hundred two million, one hundred ten thousand, twenty-one".