11112221201 has 2 divisors, whose sum is σ = 11112221202. Its totient is φ = 11112221200.

The previous prime is 11112221179. The next prime is 11112221213. The reversal of 11112221201 is 10212221111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11071248400 + 40972801 = 105220^2 + 6401^2 .

It is a cyclic number.

It is not a de Polignac number, because 11112221201 - 2¹⁸ = 11111959057 is a prime.

It is not a weakly prime, because it can be changed into another prime (11112221251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556110600 + 5556110601.

It is an arithmetic number, because the mean of its divisors is an integer number (5556110601).

Almost surely, 2^11112221201 is an apocalyptic number.

It is an amenable number.

11112221201 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112221201 is an equidigital number, since it uses as much as digits as its factorization.

11112221201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11112221201 its reverse (10212221111), we get a palindrome (21324442312).

The spelling of 11112221201 in words is "eleven billion, one hundred twelve million, two hundred twenty-one thousand, two hundred one".