105602016521 has 2 divisors, whose sum is σ = 105602016522. Its totient is φ = 105602016520.

The previous prime is 105602016413. The next prime is 105602016631. The reversal of 105602016521 is 125610206501.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61065823225 + 44536193296 = 247115^2 + 211036^2 .

It is a cyclic number.

It is not a de Polignac number, because 105602016521 - 2²⁶ = 105534907657 is a prime.

It is a super-2 number, since 2×105602016521² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105602013521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52801008260 + 52801008261.

It is an arithmetic number, because the mean of its divisors is an integer number (52801008261).

Almost surely, 2^105602016521 is an apocalyptic number.

It is an amenable number.

105602016521 is a deficient number, since it is larger than the sum of its proper divisors (1).

105602016521 is an equidigital number, since it uses as much as digits as its factorization.

105602016521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 105602016521 in words is "one hundred five billion, six hundred two million, sixteen thousand, five hundred twenty-one".