1021321302101 has 16 divisors (see below), whose sum is σ = 1111774008240. Its totient is φ = 934412881920.

The previous prime is 1021321302097. The next prime is 1021321302103. The reversal of 1021321302101 is 1012031231201.

It can be written as a sum of positive squares in 8 ways, for example, as 11648021476 + 1009673280625 = 107926^2 + 1004825^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021321302101 - 2² = 1021321302097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021321302101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021321302103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2451896 + ... + 2838033.

It is an arithmetic number, because the mean of its divisors is an integer number (69485875515).

Almost surely, 2^{1021321302101} is an apocalyptic number.

It is an amenable number.

1021321302101 is a deficient number, since it is larger than the sum of its proper divisors (90452706139).

1021321302101 is a wasteful number, since it uses less digits than its factorization.

1021321302101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5290264.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1021321302101 its reverse (1012031231201), we get a palindrome (2033352533302).

The spelling of 1021321302101 in words is "one trillion, twenty-one billion, three hundred twenty-one million, three hundred two thousand, one hundred one".