221434000421 has 8 divisors (see below), whose sum is σ = 222184014624. Its totient is φ = 220685253840.

The previous prime is 221434000399. The next prime is 221434000493. The reversal of 221434000421 is 124000434122.

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 221434000421 - 2¹⁸ = 221433738277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221434000621) 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, 33710 + ... + 666336.

It is an arithmetic number, because the mean of its divisors is an integer number (27773001828).

Almost surely, 2^221434000421 is an apocalyptic number.

It is an amenable number.

221434000421 is a deficient number, since it is larger than the sum of its proper divisors (750014203).

221434000421 is an equidigital number, since it uses as much as digits as its factorization.

221434000421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633811.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 221434000421 its reverse (124000434122), we get a palindrome (345434434543).

The spelling of 221434000421 in words is "two hundred twenty-one billion, four hundred thirty-four million, four hundred twenty-one", and thus it is an aban number.