11203020312 has 128 divisors (see below), whose sum is σ = 33199718400. Its totient is φ = 3112387200.

The previous prime is 11203020307. The next prime is 11203020329. The reversal of 11203020312 is 21302030211.

It is a super-2 number, since 2×11203020312² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11203020291 and 11203020300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119473 + ... + 191519.

It is an arithmetic number, because the mean of its divisors is an integer number (259372800).

Almost surely, 2^11203020312 is an apocalyptic number.

11203020312 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 11203020312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16599859200).

11203020312 is an abundant number, since it is smaller than the sum of its proper divisors (21996698088).

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

11203020312 is a wasteful number, since it uses less digits than its factorization.

11203020312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72117 (or 72113 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 11203020312 its reverse (21302030211), we get a palindrome (32505050523).

The spelling of 11203020312 in words is "eleven billion, two hundred three million, twenty thousand, three hundred twelve".