1223021332221 has 8 divisors (see below), whose sum is σ = 1756133195040. Its totient is φ = 752628512112.

The previous prime is 1223021332157. The next prime is 1223021332241. The reversal of 1223021332221 is 1222331203221.

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

It is not a de Polignac number, because 1223021332221 - 2⁶ = 1223021332157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1223021332191 and 1223021332200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223021332241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15679760631 + ... + 15679760708.

It is an arithmetic number, because the mean of its divisors is an integer number (219516649380).

Almost surely, 2^{1223021332221} is an apocalyptic number.

It is an amenable number.

1223021332221 is a deficient number, since it is larger than the sum of its proper divisors (533111862819).

1223021332221 is a wasteful number, since it uses less digits than its factorization.

1223021332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31359521355.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 1223021332221 its reverse (1222331203221), we get a palindrome (2445352535442).

The spelling of 1223021332221 in words is "one trillion, two hundred twenty-three billion, twenty-one million, three hundred thirty-two thousand, two hundred twenty-one".