105443202521 has 2 divisors, whose sum is σ = 105443202522. Its totient is φ = 105443202520.

The previous prime is 105443202481. The next prime is 105443202569. The reversal of 105443202521 is 125202344501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66223360921 + 39219841600 = 257339^2 + 198040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105443202521 is a prime.

It is a super-2 number, since 2×105443202521² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105443202121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52721601260 + 52721601261.

It is an arithmetic number, because the mean of its divisors is an integer number (52721601261).

Almost surely, 2^105443202521 is an apocalyptic number.

It is an amenable number.

105443202521 is a deficient number, since it is larger than the sum of its proper divisors (1).

105443202521 is an equidigital number, since it uses as much as digits as its factorization.

105443202521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 29.

The spelling of 105443202521 in words is "one hundred five billion, four hundred forty-three million, two hundred two thousand, five hundred twenty-one".