11203123312 has 20 divisors (see below), whose sum is σ = 21756194320. Its totient is φ = 5588621568.

The previous prime is 11203123307. The next prime is 11203123319. The reversal of 11203123312 is 21332130211.

It is a self number, because there is not a number n which added to its sum of digits gives 11203123312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11203123319) 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, 801612 + ... + 815467.

It is an arithmetic number, because the mean of its divisors is an integer number (1087809716).

Almost surely, 2^11203123312 is an apocalyptic number.

It is an amenable number.

11203123312 is a deficient number, since it is larger than the sum of its proper divisors (10553071008).

11203123312 is a wasteful number, since it uses less digits than its factorization.

11203123312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617520 (or 1617514 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 11203123312 its reverse (21332130211), we get a palindrome (32535253523).

The spelling of 11203123312 in words is "eleven billion, two hundred three million, one hundred twenty-three thousand, three hundred twelve".