111120222221 has 2 divisors, whose sum is σ = 111120222222. Its totient is φ = 111120222220.

The previous prime is 111120222217. The next prime is 111120222259. The reversal of 111120222221 is 122222021111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79489599721 + 31630622500 = 281939^2 + 177850^2 .

It is a cyclic number.

It is not a de Polignac number, because 111120222221 - 2² = 111120222217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111120222221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111120221221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560111110 + 55560111111.

It is an arithmetic number, because the mean of its divisors is an integer number (55560111111).

Almost surely, 2^111120222221 is an apocalyptic number.

It is an amenable number.

111120222221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111120222221 is an equidigital number, since it uses as much as digits as its factorization.

111120222221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 111120222221 its reverse (122222021111), we get a palindrome (233342243332).

The spelling of 111120222221 in words is "one hundred eleven billion, one hundred twenty million, two hundred twenty-two thousand, two hundred twenty-one".