1321212032 has 64 divisors (see below), whose sum is σ = 3036450240. Its totient is φ = 560901120.

The previous prime is 1321212019. The next prime is 1321212041. The reversal of 1321212032 is 2302121231.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 1321212032.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88982 + ... + 102762.

It is an arithmetic number, because the mean of its divisors is an integer number (47444535).

Almost surely, 2^1321212032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321212032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1518225120).

1321212032 is an abundant number, since it is smaller than the sum of its proper divisors (1715238208).

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

1321212032 is a wasteful number, since it uses less digits than its factorization.

1321212032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13909 (or 13897 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1321212032 is about 36348.4804634252. The cubic root of 1321212032 is about 1097.2969532856.

Adding to 1321212032 its reverse (2302121231), we get a palindrome (3623333263).

The spelling of 1321212032 in words is "one billion, three hundred twenty-one million, two hundred twelve thousand, thirty-two".