1013021321 has 8 divisors (see below), whose sum is σ = 1097403720. Its totient is φ = 935094576.

The previous prime is 1013021311. The next prime is 1013021341. The reversal of 1013021321 is 1231203101.

1013021321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 469198921 + 543822400 = 21661^2 + 23320^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1013021321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1013021296 and 1013021305.

It is not an unprimeable number, because it can be changed into a prime (1013021311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228350 + ... + 232743.

It is an arithmetic number, because the mean of its divisors is an integer number (137175465).

Almost surely, 2^1013021321 is an apocalyptic number.

It is an amenable number.

1013021321 is a deficient number, since it is larger than the sum of its proper divisors (84382399).

1013021321 is an frugal number, since it uses more digits than its factorization.

1013021321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461132 (or 461106 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1013021321 is about 31827.9958684175. The cubic root of 1013021321 is about 1004.3217360248.

Adding to 1013021321 its reverse (1231203101), we get a palindrome (2244224422).

The spelling of 1013021321 in words is "one billion, thirteen million, twenty-one thousand, three hundred twenty-one".