1111222223 has 2 divisors, whose sum is σ = 1111222224. Its totient is φ = 1111222222.

The previous prime is 1111222213. The next prime is 1111222247. The reversal of 1111222223 is 3222221111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1111222223 - 2¹² = 1111218127 is a prime.

It is a Sophie Germain prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111222213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555611111 + 555611112.

It is an arithmetic number, because the mean of its divisors is an integer number (555611112).

Almost surely, 2^1111222223 is an apocalyptic number.

1111222223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111222223 is an equidigital number, since it uses as much as digits as its factorization.

1111222223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96, while the sum is 17.

The square root of 1111222223 is about 33334.9999700015. Note that the first 4 decimals coincide. The cubic root of 1111222223 is about 1035.7786925478.

Adding to 1111222223 its reverse (3222221111), we get a palindrome (4333443334).

It can be divided in two parts, 11112 and 22223, that multiplied together give a triangular number (246941976 = T₂₂₂₂₃).

The spelling of 1111222223 in words is "one billion, one hundred eleven million, two hundred twenty-two thousand, two hundred twenty-three".