221120012212221 has 8 divisors (see below), whose sum is σ = 294839195316640. Its totient is φ = 147407085291312.

The previous prime is 221120012212133. The next prime is 221120012212259. The reversal of 221120012212221 is 122212210021122.

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

It is not a de Polignac number, because 221120012212221 - 2⁴⁷ = 80382523856893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221120012212721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1563963406 + ... + 1564104783.

It is an arithmetic number, because the mean of its divisors is an integer number (36854899414580).

Almost surely, 2^{221120012212221} is an apocalyptic number.

It is an amenable number.

221120012212221 is a deficient number, since it is larger than the sum of its proper divisors (73719183104419).

221120012212221 is a wasteful number, since it uses less digits than its factorization.

221120012212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3128091755.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221120012212221 its reverse (122212210021122), we get a palindrome (343332222233343).

The spelling of 221120012212221 in words is "two hundred twenty-one trillion, one hundred twenty billion, twelve million, two hundred twelve thousand, two hundred twenty-one".