10001310031021 has 4 divisors (see below), whose sum is σ = 10001467513692. Its totient is φ = 10001152548352.

The previous prime is 10001310031019. The next prime is 10001310031051. The reversal of 10001310031021 is 12013001310001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4226848164900 + 5774461866121 = 2055930^2 + 2403011^2 .

It is a cyclic number.

It is not a de Polignac number, because 10001310031021 - 2¹ = 10001310031019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10001310030992 and 10001310031010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001310031051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78646036 + ... + 78773101.

It is an arithmetic number, because the mean of its divisors is an integer number (2500366878423).

Almost surely, 2^{10001310031021} is an apocalyptic number.

It is an amenable number.

10001310031021 is a deficient number, since it is larger than the sum of its proper divisors (157482671).

10001310031021 is an equidigital number, since it uses as much as digits as its factorization.

10001310031021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157482670.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 10001310031021 its reverse (12013001310001), we get a palindrome (22014311341022).

The spelling of 10001310031021 in words is "ten trillion, one billion, three hundred ten million, thirty-one thousand, twenty-one".