221221000331 has 8 divisors (see below), whose sum is σ = 231108455424. Its totient is φ = 211505501160.

The previous prime is 221221000283. The next prime is 221221000373. The reversal of 221221000331 is 133000122122.

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 221221000331 - 2⁶ = 221221000267 is a prime.

It is a super-2 number, since 2×221221000331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221221000381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42986351 + ... + 42991496.

It is an arithmetic number, because the mean of its divisors is an integer number (28888556928).

Almost surely, 2^221221000331 is an apocalyptic number.

221221000331 is a deficient number, since it is larger than the sum of its proper divisors (9887455093).

221221000331 is an equidigital number, since it uses as much as digits as its factorization.

221221000331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85977961.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 221221000331 its reverse (133000122122), we get a palindrome (354221122453).

The spelling of 221221000331 in words is "two hundred twenty-one billion, two hundred twenty-one million, three hundred thirty-one", and thus it is an aban number.