111200213021 has 2 divisors, whose sum is σ = 111200213022. Its totient is φ = 111200213020.

The previous prime is 111200213009. The next prime is 111200213039. The reversal of 111200213021 is 120312002111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81175987396 + 30024225625 = 284914^2 + 173275^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111200213021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111200212987 and 111200213005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111200213041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55600106510 + 55600106511.

It is an arithmetic number, because the mean of its divisors is an integer number (55600106511).

Almost surely, 2^111200213021 is an apocalyptic number.

It is an amenable number.

111200213021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111200213021 is an equidigital number, since it uses as much as digits as its factorization.

111200213021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 111200213021 its reverse (120312002111), we get a palindrome (231512215132).

The spelling of 111200213021 in words is "one hundred eleven billion, two hundred million, two hundred thirteen thousand, twenty-one".