11223213431 has 2 divisors, whose sum is σ = 11223213432. Its totient is φ = 11223213430.

The previous prime is 11223213413. The next prime is 11223213439. The reversal of 11223213431 is 13431232211.

Together with previous prime (11223213413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11223213431 is a prime.

It is a super-2 number, since 2×11223213431² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11223213397 and 11223213406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11223213439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5611606715 + 5611606716.

It is an arithmetic number, because the mean of its divisors is an integer number (5611606716).

Almost surely, 2^11223213431 is an apocalyptic number.

11223213431 is a deficient number, since it is larger than the sum of its proper divisors (1).

11223213431 is an equidigital number, since it uses as much as digits as its factorization.

11223213431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

Adding to 11223213431 its reverse (13431232211), we get a palindrome (24654445642).

The spelling of 11223213431 in words is "eleven billion, two hundred twenty-three million, two hundred thirteen thousand, four hundred thirty-one".