11311223100 has 144 divisors (see below), whose sum is σ = 33817335552. Its totient is φ = 2917232640.

The previous prime is 11311223069. The next prime is 11311223117. The reversal of 11311223100 is 132211311.

It is a happy number.

It is a super-2 number, since 2×11311223100² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11311223100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1324444 + ... + 1332956.

It is an arithmetic number, because the mean of its divisors is an integer number (234842608).

Almost surely, 2^11311223100 is an apocalyptic number.

11311223100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11311223100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16908667776).

11311223100 is an abundant number, since it is smaller than the sum of its proper divisors (22506112452).

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

11311223100 is a wasteful number, since it uses less digits than its factorization.

11311223100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8676 (or 8669 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 11311223100 its reverse (132211311), we get a palindrome (11443434411).

The spelling of 11311223100 in words is "eleven billion, three hundred eleven million, two hundred twenty-three thousand, one hundred".