104343120521 has 4 divisors (see below), whose sum is σ = 104347201092. Its totient is φ = 104339039952.

The previous prime is 104343120509. The next prime is 104343120533. The reversal of 104343120521 is 125021343401.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (104343120509) and next prime (104343120533).

It can be written as a sum of positive squares in 2 ways, for example, as 41259765625 + 63083354896 = 203125^2 + 251164^2 .

It is a cyclic number.

It is not a de Polignac number, because 104343120521 - 2²² = 104338926217 is a prime.

It is a super-2 number, since 2×104343120521² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104343120551) 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 in 3 ways as a sum of consecutive naturals, for example, 2001686 + ... + 2053151.

It is an arithmetic number, because the mean of its divisors is an integer number (26086800273).

Almost surely, 2^104343120521 is an apocalyptic number.

It is an amenable number.

104343120521 is a deficient number, since it is larger than the sum of its proper divisors (4080571).

104343120521 is an equidigital number, since it uses as much as digits as its factorization.

104343120521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4080570.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 104343120521 its reverse (125021343401), we get a palindrome (229364463922).

The spelling of 104343120521 in words is "one hundred four billion, three hundred forty-three million, one hundred twenty thousand, five hundred twenty-one".