221301855230621 has 8 divisors (see below), whose sum is σ = 241911896558688. Its totient is φ = 200773762378000.

The previous prime is 221301855230569. The next prime is 221301855230633. The reversal of 221301855230621 is 126032558103122.

221301855230621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221301855230621 - 2³⁰ = 221300781488797 is a prime.

It is a super-2 number, since 2×221301855230621² (a number of 29 digits) contains 22 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 (221301855230321) 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, 20487113210 + ... + 20487124011.

It is an arithmetic number, because the mean of its divisors is an integer number (30238987069836).

Almost surely, 2^{221301855230621} is an apocalyptic number.

It is an amenable number.

221301855230621 is a deficient number, since it is larger than the sum of its proper divisors (20610041328067).

221301855230621 is a wasteful number, since it uses less digits than its factorization.

221301855230621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40974237723.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 221301855230621 in words is "two hundred twenty-one trillion, three hundred one billion, eight hundred fifty-five million, two hundred thirty thousand, six hundred twenty-one".