11223111213 has 12 divisors (see below), whose sum is σ = 16371668508. Its totient is φ = 7407993600.

The previous prime is 11223111139. The next prime is 11223111227. The reversal of 11223111213 is 31211132211.

It can be written as a sum of positive squares in 2 ways, for example, as 7357007529 + 3866103684 = 85773^2 + 62178^2 .

It is not a de Polignac number, because 11223111213 - 2⁸ = 11223110957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11223111233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6172420 + ... + 6174237.

It is an arithmetic number, because the mean of its divisors is an integer number (1364305709).

Almost surely, 2^11223111213 is an apocalyptic number.

It is an amenable number.

11223111213 is a deficient number, since it is larger than the sum of its proper divisors (5148557295).

11223111213 is a wasteful number, since it uses less digits than its factorization.

11223111213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12346764 (or 12346761 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 11223111213 its reverse (31211132211), we get a palindrome (42434243424).

The spelling of 11223111213 in words is "eleven billion, two hundred twenty-three million, one hundred eleven thousand, two hundred thirteen".