1321133310 has 96 divisors (see below), whose sum is σ = 3992302080. Its totient is φ = 296846784.

The previous prime is 1321133273. The next prime is 1321133371. The reversal of 1321133310 is 133311231.

It is a happy number.

1321133310 is a `hidden beast` number, since 1 + 321 + 1 + 33 + 310 = 666.

It is a super-2 number, since 2×1321133310² = 3490786445583112200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19399 + ... + 54941.

It is an arithmetic number, because the mean of its divisors is an integer number (41586480).

Almost surely, 2^1321133310 is an apocalyptic number.

1321133310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321133310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1996151040).

1321133310 is an abundant number, since it is smaller than the sum of its proper divisors (2671168770).

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

1321133310 is a wasteful number, since it uses less digits than its factorization.

1321133310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35622 (or 35619 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1321133310 is about 36347.3975684642. The cubic root of 1321133310 is about 1097.2751593761.

Adding to 1321133310 its reverse (133311231), we get a palindrome (1454444541).

The spelling of 1321133310 in words is "one billion, three hundred twenty-one million, one hundred thirty-three thousand, three hundred ten".