3500424043221 has 16 divisors (see below), whose sum is σ = 5334568588800. Its totient is φ = 2000021400048.

The previous prime is 3500424043219. The next prime is 3500424043253. The reversal of 3500424043221 is 1223404240053.

It is not a de Polignac number, because 3500424043221 - 2¹ = 3500424043219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3500424043321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9009831 + ... + 9390308.

It is an arithmetic number, because the mean of its divisors is an integer number (333410536800).

Almost surely, 2^{3500424043221} is an apocalyptic number.

It is an amenable number.

3500424043221 is a deficient number, since it is larger than the sum of its proper divisors (1834144545579).

3500424043221 is a wasteful number, since it uses less digits than its factorization.

3500424043221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18409208.

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 3500424043221 its reverse (1223404240053), we get a palindrome (4723828283274).

The spelling of 3500424043221 in words is "three trillion, five hundred billion, four hundred twenty-four million, forty-three thousand, two hundred twenty-one".