1201130320 has 120 divisors (see below), whose sum is σ = 3067913016. Its totient is φ = 437059584.

The previous prime is 1201130317. The next prime is 1201130347. The reversal of 1201130320 is 230311021.

It can be written as a sum of positive squares in 12 ways, for example, as 741799696 + 459330624 = 27236^2 + 21432^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 1201130320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 986352 + ... + 987568.

Almost surely, 2^1201130320 is an apocalyptic number.

1201130320 is a gapful number since it is divisible by the number (10) 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 1201130320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1533956508).

1201130320 is an abundant number, since it is smaller than the sum of its proper divisors (1866782696).

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

1201130320 is a wasteful number, since it uses less digits than its factorization.

1201130320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329 (or 1310 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1201130320 is about 34657.3270752376. The cubic root of 1201130320 is about 1062.9921156544.

Adding to 1201130320 its reverse (230311021), we get a palindrome (1431441341).

The spelling of 1201130320 in words is "one billion, two hundred one million, one hundred thirty thousand, three hundred twenty".