1021320120 has 32 divisors (see below), whose sum is σ = 3063960720. Its totient is φ = 272352000.

The previous prime is 1021320107. The next prime is 1021320143. The reversal of 1021320120 is 210231201.

1021320120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1021320096 and 1021320105.

It is a congruent number.

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, 4255381 + ... + 4255620.

Almost surely, 2^1021320120 is an apocalyptic number.

1021320120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021320120 is an abundant number, since it is smaller than the sum of its proper divisors (2042640600).

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

1021320120 is a wasteful number, since it uses less digits than its factorization.

1021320120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8511015 (or 8511011 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1021320120 is about 31958.0994428642. The cubic root of 1021320120 is about 1007.0567912255.

Adding to 1021320120 its reverse (210231201), we get a palindrome (1231551321).

The spelling of 1021320120 in words is "one billion, twenty-one million, three hundred twenty thousand, one hundred twenty".