1111223213 has 2 divisors, whose sum is σ = 1111223214. Its totient is φ = 1111223212.

The previous prime is 1111223171. The next prime is 1111223237. The reversal of 1111223213 is 3123221111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 932813764 + 178409449 = 30542^2 + 13357^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111223213 - 2⁶ = 1111223149 is a prime.

It is a super-2 number, since 2×1111223213² = 2469634058220086738, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1111223191 and 1111223200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111223263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555611606 + 555611607.

It is an arithmetic number, because the mean of its divisors is an integer number (555611607).

Almost surely, 2^1111223213 is an apocalyptic number.

It is an amenable number.

1111223213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111223213 is an equidigital number, since it uses as much as digits as its factorization.

1111223213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 17.

The square root of 1111223213 is about 33335.0148192557. The cubic root of 1111223213 is about 1035.7790001432.

Adding to 1111223213 its reverse (3123221111), we get a palindrome (4234444324).

The spelling of 1111223213 in words is "one billion, one hundred eleven million, two hundred twenty-three thousand, two hundred thirteen".