1021213320 has 64 divisors (see below), whose sum is σ = 3146454720. Its totient is φ = 264962304.

The previous prime is 1021213313. The next prime is 1021213331. The reversal of 1021213320 is 233121201.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1021213320.

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 15 ways as a sum of consecutive naturals, for example, 110562 + ... + 119441.

It is an arithmetic number, because the mean of its divisors is an integer number (49163355).

Almost surely, 2^1021213320 is an apocalyptic number.

1021213320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021213320 is an abundant number, since it is smaller than the sum of its proper divisors (2125241400).

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

1021213320 is a wasteful number, since it uses less digits than its factorization.

1021213320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230054 (or 230050 counting only the distinct ones).

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

The square root of 1021213320 is about 31956.4284612658. The cubic root of 1021213320 is about 1007.0216871766.

Adding to 1021213320 its reverse (233121201), we get a palindrome (1254334521).

It can be divided in two parts, 10212 and 13320, that added together give a palindrome (23532).

The spelling of 1021213320 in words is "one billion, twenty-one million, two hundred thirteen thousand, three hundred twenty".