10421043232505 has 8 divisors (see below), whose sum is σ = 12549754556424. Its totient is φ = 8307166134400.

The previous prime is 10421043232451. The next prime is 10421043232507. The reversal of 10421043232505 is 50523234012401.

It can be written as a sum of positive squares in 4 ways, for example, as 1076937515536 + 9344105716969 = 1037756^2 + 3056813^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10421043232505 - 2³⁰ = 10419969490681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10421043232507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3708554906 + ... + 3708557715.

It is an arithmetic number, because the mean of its divisors is an integer number (1568719319553).

Almost surely, 2^{10421043232505} is an apocalyptic number.

It is an amenable number.

10421043232505 is a deficient number, since it is larger than the sum of its proper divisors (2128711323919).

10421043232505 is an equidigital number, since it uses as much as digits as its factorization.

10421043232505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7417112907.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 10421043232505 its reverse (50523234012401), we get a palindrome (60944277244906).

The spelling of 10421043232505 in words is "ten trillion, four hundred twenty-one billion, forty-three million, two hundred thirty-two thousand, five hundred five".