1021320105 has 48 divisors (see below), whose sum is σ = 1798810944. Its totient is φ = 491898240.

The previous prime is 1021320089. The next prime is 1021320107. The reversal of 1021320105 is 5010231201.

1021320105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1021320105 - 2⁴ = 1021320089 is a prime.

It is a super-2 number, since 2×1021320105² = 2086189513754422050, which contains 22 as substring.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1021320107) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 429570 + ... + 431940.

It is an arithmetic number, because the mean of its divisors is an integer number (37475228).

Almost surely, 2^1021320105 is an apocalyptic number.

1021320105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1021320105 is a deficient number, since it is larger than the sum of its proper divisors (777490839).

1021320105 is a wasteful number, since it uses less digits than its factorization.

1021320105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486 (or 2439 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 1021320105 is about 31958.0992081820. The cubic root of 1021320105 is about 1007.0567862954.

Adding to 1021320105 its reverse (5010231201), we get a palindrome (6031551306).

The spelling of 1021320105 in words is "one billion, twenty-one million, three hundred twenty thousand, one hundred five".