10011001031021 has 4 divisors (see below), whose sum is σ = 10281568626492. Its totient is φ = 9740433435552.

The previous prime is 10011001031011. The next prime is 10011001031089. The reversal of 10011001031021 is 12013010011001.

It is a happy number.

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 5667799149796 + 4343201881225 = 2380714^2 + 2084035^2 .

It is a cyclic number.

It is not a de Polignac number, because 10011001031021 - 2¹⁸ = 10011000768877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10011001030993 and 10011001031011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10011001031011) 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, 135283797680 + ... + 135283797753.

It is an arithmetic number, because the mean of its divisors is an integer number (2570392156623).

Almost surely, 2^{10011001031021} is an apocalyptic number.

It is an amenable number.

10011001031021 is a deficient number, since it is larger than the sum of its proper divisors (270567595471).

10011001031021 is an equidigital number, since it uses as much as digits as its factorization.

10011001031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270567595470.

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 10011001031021 its reverse (12013010011001), we get a palindrome (22024011042022).

The spelling of 10011001031021 in words is "ten trillion, eleven billion, one million, thirty-one thousand, twenty-one".