1201331320 has 32 divisors (see below), whose sum is σ = 3089138400. Its totient is φ = 411884928.

The previous prime is 1201331311. The next prime is 1201331357. The reversal of 1201331320 is 231331021.

It is a junction number, because it is equal to n+sod(n) for n = 1201331294 and 1201331303.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2144955 + ... + 2145514.

It is an arithmetic number, because the mean of its divisors is an integer number (96535575).

Almost surely, 2^1201331320 is an apocalyptic number.

1201331320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201331320 is an abundant number, since it is smaller than the sum of its proper divisors (1887807080).

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

1201331320 is a wasteful number, since it uses less digits than its factorization.

1201331320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4290487 (or 4290483 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1201331320 is about 34660.2267736378. The cubic root of 1201331320 is about 1063.0514068889.

Adding to 1201331320 its reverse (231331021), we get a palindrome (1432662341).

The spelling of 1201331320 in words is "one billion, two hundred one million, three hundred thirty-one thousand, three hundred twenty".