221304410421 has 8 divisors (see below), whose sum is σ = 295078188864. Its totient is φ = 147533452800.

The previous prime is 221304410413. The next prime is 221304410423. The reversal of 221304410421 is 124014403122.

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

It is not a de Polignac number, because 221304410421 - 2³ = 221304410413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221304410391 and 221304410400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221304410423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514801 + ... + 841206.

It is an arithmetic number, because the mean of its divisors is an integer number (36884773608).

Almost surely, 2^221304410421 is an apocalyptic number.

It is an amenable number.

221304410421 is a deficient number, since it is larger than the sum of its proper divisors (73773778443).

221304410421 is a wasteful number, since it uses less digits than its factorization.

221304410421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410411.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 221304410421 its reverse (124014403122), we get a palindrome (345318813543).

The spelling of 221304410421 in words is "two hundred twenty-one billion, three hundred four million, four hundred ten thousand, four hundred twenty-one".