221220120020221 has 8 divisors (see below), whose sum is σ = 253956729711104. Its totient is φ = 188766944179920.

The previous prime is 221220120020189. The next prime is 221220120020327. The reversal of 221220120020221 is 122020021022122.

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 221220120020221 - 2⁵ = 221220120020189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220130020221) 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, 70858460970 + ... + 70858464091.

It is an arithmetic number, because the mean of its divisors is an integer number (31744591213888).

Almost surely, 2^{221220120020221} is an apocalyptic number.

It is an amenable number.

221220120020221 is a deficient number, since it is larger than the sum of its proper divisors (32736609690883).

221220120020221 is a wasteful number, since it uses less digits than its factorization.

221220120020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141716925291.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221220120020221 its reverse (122020021022122), we get a palindrome (343240141042343).

The spelling of 221220120020221 in words is "two hundred twenty-one trillion, two hundred twenty billion, one hundred twenty million, twenty thousand, two hundred twenty-one".