3521005522421 has 8 divisors (see below), whose sum is σ = 3674584021824. Its totient is φ = 3367467964960.

The previous prime is 3521005522379. The next prime is 3521005522423. The reversal of 3521005522421 is 1242255001253.

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

It is a cyclic number.

It is not a de Polignac number, because 3521005522421 - 2³⁸ = 3246127615477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3521005522423) 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, 10059671 + ... + 10403796.

It is an arithmetic number, because the mean of its divisors is an integer number (459323002728).

Almost surely, 2^{3521005522421} is an apocalyptic number.

It is an amenable number.

3521005522421 is a deficient number, since it is larger than the sum of its proper divisors (153578499403).

3521005522421 is a wasteful number, since it uses less digits than its factorization.

3521005522421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20470971.

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 3521005522421 in words is "three trillion, five hundred twenty-one billion, five million, five hundred twenty-two thousand, four hundred twenty-one".