11213131223 has 4 divisors (see below), whose sum is σ = 12815007120. Its totient is φ = 9611255328.

The previous prime is 11213131217. The next prime is 11213131229. The reversal of 11213131223 is 32213131211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32213131211 = 257 ⋅125342923.

It is an interprime number because it is at equal distance from previous prime (11213131217) and next prime (11213131229).

It is a cyclic number.

It is not a de Polignac number, because 11213131223 - 2⁶ = 11213131159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11213131195 and 11213131204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213131229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 800937938 + ... + 800937951.

It is an arithmetic number, because the mean of its divisors is an integer number (3203751780).

Almost surely, 2^11213131223 is an apocalyptic number.

11213131223 is a deficient number, since it is larger than the sum of its proper divisors (1601875897).

11213131223 is an equidigital number, since it uses as much as digits as its factorization.

11213131223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601875896.

The product of its digits is 216, while the sum is 20.

Adding to 11213131223 its reverse (32213131211), we get a palindrome (43426262434).

The spelling of 11213131223 in words is "eleven billion, two hundred thirteen million, one hundred thirty-one thousand, two hundred twenty-three".