10031320300021 has 4 divisors (see below), whose sum is σ = 10275986648844. Its totient is φ = 9786653951200.

The previous prime is 10031320300013. The next prime is 10031320300091. The reversal of 10031320300021 is 12000302313001.

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 957881093796 + 9073439206225 = 978714^2 + 3012215^2 .

It is a cyclic number.

It is not a de Polignac number, because 10031320300021 - 2³ = 10031320300013 is a prime.

It is a super-2 number, since 2×10031320300021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10031320299968 and 10031320300004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10031320300091) 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, 122333174350 + ... + 122333174431.

It is an arithmetic number, because the mean of its divisors is an integer number (2568996662211).

Almost surely, 2^{10031320300021} is an apocalyptic number.

It is an amenable number.

10031320300021 is a deficient number, since it is larger than the sum of its proper divisors (244666348823).

10031320300021 is an equidigital number, since it uses as much as digits as its factorization.

10031320300021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244666348822.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 10031320300021 its reverse (12000302313001), we get a palindrome (22031622613022).

The spelling of 10031320300021 in words is "ten trillion, thirty-one billion, three hundred twenty million, three hundred thousand, twenty-one".