221301030021 has 8 divisors (see below), whose sum is σ = 296164948320. Its totient is φ = 146985565872.

The previous prime is 221301030001. The next prime is 221301030023. The reversal of 221301030021 is 120030103122.

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

It is not a de Polignac number, because 221301030021 - 2¹³ = 221301021829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221301030023) 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, 137112595 + ... + 137114208.

It is an arithmetic number, because the mean of its divisors is an integer number (37020618540).

Almost surely, 2^221301030021 is an apocalyptic number.

It is an amenable number.

221301030021 is a deficient number, since it is larger than the sum of its proper divisors (74863918299).

221301030021 is a wasteful number, since it uses less digits than its factorization.

221301030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274227075.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 221301030021 its reverse (120030103122), we get a palindrome (341331133143).

The spelling of 221301030021 in words is "two hundred twenty-one billion, three hundred one million, thirty thousand, twenty-one".