11103031212 has 96 divisors (see below), whose sum is σ = 32100096000. Its totient is φ = 2908576512.

The previous prime is 11103031193. The next prime is 11103031213. The reversal of 11103031212 is 21213030111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11103031191 and 11103031200.

It is not an unprimeable number, because it can be changed into a prime (11103031213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128589 + ... + 196827.

It is an arithmetic number, because the mean of its divisors is an integer number (334376000).

Almost surely, 2^11103031212 is an apocalyptic number.

11103031212 is a gapful number since it is divisible by the number (12) 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 11103031212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16050048000).

11103031212 is an abundant number, since it is smaller than the sum of its proper divisors (20997064788).

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

11103031212 is a wasteful number, since it uses less digits than its factorization.

11103031212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68415 (or 68413 counting only the distinct ones).

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

Adding to 11103031212 its reverse (21213030111), we get a palindrome (32316061323).

The spelling of 11103031212 in words is "eleven billion, one hundred three million, thirty-one thousand, two hundred twelve".