1203021312 has 80 divisors (see below), whose sum is σ = 3249129840. Its totient is φ = 395476992.

The previous prime is 1203021301. The next prime is 1203021317. The reversal of 1203021312 is 2131203021.

It is a junction number, because it is equal to n+sod(n) for n = 1203021291 and 1203021300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203021317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106764 + ... + 117492.

It is an arithmetic number, because the mean of its divisors is an integer number (40614123).

Almost surely, 2^1203021312 is an apocalyptic number.

1203021312 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 1203021312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1624564920).

1203021312 is an abundant number, since it is smaller than the sum of its proper divisors (2046108528).

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

1203021312 is an equidigital number, since it uses as much as digits as its factorization.

1203021312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10823 (or 10807 counting only the distinct ones).

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

The square root of 1203021312 is about 34684.5976191162. The cubic root of 1203021312 is about 1063.5496614947.

Adding to 1203021312 its reverse (2131203021), we get a palindrome (3334224333).

The spelling of 1203021312 in words is "one billion, two hundred three million, twenty-one thousand, three hundred twelve".