221233212410421 has 32 divisors (see below), whose sum is σ = 314351795520000. Its totient is φ = 137995328472768.

The previous prime is 221233212410359. The next prime is 221233212410443. The reversal of 221233212410421 is 124014212332122.

It is not a de Polignac number, because 221233212410421 - 2¹³ = 221233212402229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221233212410521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5724930 + ... + 21800028.

It is an arithmetic number, because the mean of its divisors is an integer number (9823493610000).

Almost surely, 2^{221233212410421} is an apocalyptic number.

It is an amenable number.

221233212410421 is a deficient number, since it is larger than the sum of its proper divisors (93118583109579).

221233212410421 is a wasteful number, since it uses less digits than its factorization.

221233212410421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16078113.

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 221233212410421 its reverse (124014212332122), we get a palindrome (345247424742543).

The spelling of 221233212410421 in words is "two hundred twenty-one trillion, two hundred thirty-three billion, two hundred twelve million, four hundred ten thousand, four hundred twenty-one".