11221323431 has 2 divisors, whose sum is σ = 11221323432. Its totient is φ = 11221323430.

The previous prime is 11221323391. The next prime is 11221323437. The reversal of 11221323431 is 13432312211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11221323431 - 2²⁶ = 11154214567 is a prime.

It is a super-2 number, since 2×11221323431² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11221323397 and 11221323406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11221323437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610661715 + 5610661716.

It is an arithmetic number, because the mean of its divisors is an integer number (5610661716).

Almost surely, 2^11221323431 is an apocalyptic number.

11221323431 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221323431 is an equidigital number, since it uses as much as digits as its factorization.

11221323431 is an odious number, because the sum of its binary digits is odd.

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

Adding to 11221323431 its reverse (13432312211), we get a palindrome (24653635642).

The spelling of 11221323431 in words is "eleven billion, two hundred twenty-one million, three hundred twenty-three thousand, four hundred thirty-one".