11231031222 has 12 divisors (see below), whose sum is σ = 24333901020. Its totient is φ = 3743677068.

The previous prime is 11231031221. The next prime is 11231031223. The reversal of 11231031222 is 22213013211.

It is an interprime number because it is at equal distance from previous prime (11231031221) and next prime (11231031223).

It is a super-2 number, since 2×11231031222² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 623946179 = 11231031222 / (1 + 1 + 2 + 3 + 1 + 0 + 3 + 1 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 11231031195 and 11231031204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11231031221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 311973072 + ... + 311973107.

It is an arithmetic number, because the mean of its divisors is an integer number (2027825085).

Almost surely, 2^11231031222 is an apocalyptic number.

11231031222 is an abundant number, since it is smaller than the sum of its proper divisors (13102869798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11231031222 is a wasteful number, since it uses less digits than its factorization.

11231031222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623946187 (or 623946184 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 11231031222 its reverse (22213013211), we get a palindrome (33444044433).

The spelling of 11231031222 in words is "eleven billion, two hundred thirty-one million, thirty-one thousand, two hundred twenty-two".