10011320021 has 2 divisors, whose sum is σ = 10011320022. Its totient is φ = 10011320020.

The previous prime is 10011319993. The next prime is 10011320051. The reversal of 10011320021 is 12002311001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8801254225 + 1210065796 = 93815^2 + 34786^2 .

It is a cyclic number.

It is not a de Polignac number, because 10011320021 - 2¹⁴ = 10011303637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10011319984 and 10011320011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10011320051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005660010 + 5005660011.

It is an arithmetic number, because the mean of its divisors is an integer number (5005660011).

Almost surely, 2^10011320021 is an apocalyptic number.

It is an amenable number.

10011320021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10011320021 is an equidigital number, since it uses as much as digits as its factorization.

10011320021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 10011320021 its reverse (12002311001), we get a palindrome (22013631022).

The spelling of 10011320021 in words is "ten billion, eleven million, three hundred twenty thousand, twenty-one".