13350521021 has 2 divisors, whose sum is σ = 13350521022. Its totient is φ = 13350521020.

The previous prime is 13350520993. The next prime is 13350521029. The reversal of 13350521021 is 12012505331.

It is a happy number.

13350521021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13306776025 + 43744996 = 115355^2 + 6614^2 .

It is a cyclic number.

It is not a de Polignac number, because 13350521021 - 2⁶ = 13350520957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13350521029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6675260510 + 6675260511.

It is an arithmetic number, because the mean of its divisors is an integer number (6675260511).

Almost surely, 2^13350521021 is an apocalyptic number.

It is an amenable number.

13350521021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13350521021 is an equidigital number, since it uses as much as digits as its factorization.

13350521021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 23.

The spelling of 13350521021 in words is "thirteen billion, three hundred fifty million, five hundred twenty-one thousand, twenty-one".