1013321301021 has 6 divisors (see below), whose sum is σ = 1463686323710. Its totient is φ = 675547534008.

The previous prime is 1013321301019. The next prime is 1013321301023. The reversal of 1013321301021 is 1201031233101.

1013321301021 is a `hidden beast` number, since 10 + 1 + 332 + 1 + 301 + 0 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (1013321301019) and next prime (1013321301023).

It can be written as a sum of positive squares in only one way, i.e., 988206975396 + 25114325625 = 994086^2 + 158475^2 .

It is not a de Polignac number, because 1013321301021 - 2¹ = 1013321301019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1013321300985 and 1013321301003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1013321301023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56295627826 + ... + 56295627843.

Almost surely, 2^{1013321301021} is an apocalyptic number.

It is an amenable number.

1013321301021 is a deficient number, since it is larger than the sum of its proper divisors (450365022689).

1013321301021 is a wasteful number, since it uses less digits than its factorization.

1013321301021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112591255675 (or 112591255672 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 1013321301021 its reverse (1201031233101), we get a palindrome (2214352534122).

The spelling of 1013321301021 in words is "one trillion, thirteen billion, three hundred twenty-one million, three hundred one thousand, twenty-one".