111120200011021 has 2 divisors, whose sum is σ = 111120200011022. Its totient is φ = 111120200011020.

The previous prime is 111120200011019. The next prime is 111120200011061. The reversal of 111120200011021 is 120110002021111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74425318794121 + 36694881216900 = 8627011^2 + 6057630^2 .

It is a cyclic number.

It is not a de Polignac number, because 111120200011021 - 2¹ = 111120200011019 is a prime.

It is a super-2 number, since 2×111120200011021² (a number of 29 digits) contains 22 as substring.

Together with 111120200011019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 111120200010992 and 111120200011010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111120200011061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560100005510 + 55560100005511.

It is an arithmetic number, because the mean of its divisors is an integer number (55560100005511).

Almost surely, 2^{111120200011021} is an apocalyptic number.

It is an amenable number.

111120200011021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111120200011021 is an equidigital number, since it uses as much as digits as its factorization.

111120200011021 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 13.

Adding to 111120200011021 its reverse (120110002021111), we get a palindrome (231230202032132).

The spelling of 111120200011021 in words is "one hundred eleven trillion, one hundred twenty billion, two hundred million, eleven thousand, twenty-one".