221221102333021 has 8 divisors (see below), whose sum is σ = 252919630428800. Its totient is φ = 189546452606448.

The previous prime is 221221102333003. The next prime is 221221102333027. The reversal of 221221102333021 is 120333201122122.

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

It is not a de Polignac number, because 221221102333021 - 2³⁷ = 221083663379549 is a prime.

It is a super-2 number, since 2×221221102333021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221221102333027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5969572446 + ... + 5969609503.

It is an arithmetic number, because the mean of its divisors is an integer number (31614953803600).

Almost surely, 2^{221221102333021} is an apocalyptic number.

It is an amenable number.

221221102333021 is a deficient number, since it is larger than the sum of its proper divisors (31698528095779).

221221102333021 is a wasteful number, since it uses less digits than its factorization.

221221102333021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11939184603.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 221221102333021 its reverse (120333201122122), we get a palindrome (341554303455143).

The spelling of 221221102333021 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, one hundred two million, three hundred thirty-three thousand, twenty-one".