103545505421 has 4 divisors (see below), whose sum is σ = 103546172412. Its totient is φ = 103544838432.

The previous prime is 103545505403. The next prime is 103545505423. The reversal of 103545505421 is 124505545301.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 56234905321 + 47310600100 = 237139^2 + 217510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103545505421 is a prime.

It is a super-3 number, since 3×103545505421³ (a number of 34 digits) contains 333 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 (103545505423) 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, 35351 + ... + 456443.

It is an arithmetic number, because the mean of its divisors is an integer number (25886543103).

Almost surely, 2^103545505421 is an apocalyptic number.

It is an amenable number.

103545505421 is a deficient number, since it is larger than the sum of its proper divisors (666991).

103545505421 is an equidigital number, since it uses as much as digits as its factorization.

103545505421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666990.

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 103545505421 in words is "one hundred three billion, five hundred forty-five million, five hundred five thousand, four hundred twenty-one".