111220100020201 has 2 divisors, whose sum is σ = 111220100020202. Its totient is φ = 111220100020200.

The previous prime is 111220100020181. The next prime is 111220100020247. The reversal of 111220100020201 is 102020001022111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109856287125225 + 1363812894976 = 10481235^2 + 1167824^2 .

It is an emirp because it is prime and its reverse (102020001022111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111220100020201 is a prime.

It is not a weakly prime, because it can be changed into another prime (111220100026201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610050010100 + 55610050010101.

It is an arithmetic number, because the mean of its divisors is an integer number (55610050010101).

Almost surely, 2^{111220100020201} is an apocalyptic number.

It is an amenable number.

111220100020201 is a deficient number, since it is larger than the sum of its proper divisors (1).

111220100020201 is an equidigital number, since it uses as much as digits as its factorization.

111220100020201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 111220100020201 its reverse (102020001022111), we get a palindrome (213240101042312).

The spelling of 111220100020201 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred million, twenty thousand, two hundred one".