1021203312 has 80 divisors (see below), whose sum is σ = 2758537728. Its totient is φ = 324924160.

The previous prime is 1021203307. The next prime is 1021203319. The reversal of 1021203312 is 2133021201.

It is a junction number, because it is equal to n+sod(n) for n = 1021203291 and 1021203300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021203319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1038373 + ... + 1039355.

Almost surely, 2^1021203312 is an apocalyptic number.

1021203312 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 1021203312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1379268864).

1021203312 is an abundant number, since it is smaller than the sum of its proper divisors (1737334416).

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

1021203312 is a wasteful number, since it uses less digits than its factorization.

1021203312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958 (or 1952 counting only the distinct ones).

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

The square root of 1021203312 is about 31956.2718726700. The cubic root of 1021203312 is about 1007.0183975257.

Adding to 1021203312 its reverse (2133021201), we get a palindrome (3154224513).

The spelling of 1021203312 in words is "one billion, twenty-one million, two hundred three thousand, three hundred twelve".