1021212320 has 48 divisors (see below), whose sum is σ = 2415329280. Its totient is φ = 408025344.

The previous prime is 1021212307. The next prime is 1021212331. The reversal of 1021212320 is 232121201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1021212295 and 1021212304.

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, 163169 + ... + 169311.

It is an arithmetic number, because the mean of its divisors is an integer number (50319360).

Almost surely, 2^1021212320 is an apocalyptic number.

1021212320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021212320 is an abundant number, since it is smaller than the sum of its proper divisors (1394116960).

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

1021212320 is a wasteful number, since it uses less digits than its factorization.

1021212320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7197 (or 7189 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1021212320 is about 31956.4128149578. The cubic root of 1021212320 is about 1007.0213584754.

Adding to 1021212320 its reverse (232121201), we get a palindrome (1253333521).

The spelling of 1021212320 in words is "one billion, twenty-one million, two hundred twelve thousand, three hundred twenty".