105413425021 has 4 divisors (see below), whose sum is σ = 105431428732. Its totient is φ = 105395421312.

The previous prime is 105413425003. The next prime is 105413425067. The reversal of 105413425021 is 120524314501.

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 80159765625 + 25253659396 = 283125^2 + 158914^2 .

It is a cyclic number.

It is not a de Polignac number, because 105413425021 - 2²³ = 105405036413 is a prime.

It is a super-2 number, since 2×105413425021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105413425081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8993070 + ... + 9004783.

It is an arithmetic number, because the mean of its divisors is an integer number (26357857183).

Almost surely, 2^105413425021 is an apocalyptic number.

It is an amenable number.

105413425021 is a deficient number, since it is larger than the sum of its proper divisors (18003711).

105413425021 is an equidigital number, since it uses as much as digits as its factorization.

105413425021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18003710.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 105413425021 its reverse (120524314501), we get a palindrome (225937739522).

The spelling of 105413425021 in words is "one hundred five billion, four hundred thirteen million, four hundred twenty-five thousand, twenty-one".