221434324121 has 8 divisors (see below), whose sum is σ = 231293974080. Its totient is φ = 211722939792.

The previous prime is 221434324091. The next prime is 221434324123. The reversal of 221434324121 is 121423434122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221434324121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221434324123) 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, 37063355 + ... + 37069328.

It is an arithmetic number, because the mean of its divisors is an integer number (28911746760).

Almost surely, 2^221434324121 is an apocalyptic number.

It is an amenable number.

221434324121 is a deficient number, since it is larger than the sum of its proper divisors (9859649959).

221434324121 is a wasteful number, since it uses less digits than its factorization.

221434324121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74132815.

The product of its digits is 9216, while the sum is 29.

Adding to 221434324121 its reverse (121423434122), we get a palindrome (342857758243).

The spelling of 221434324121 in words is "two hundred twenty-one billion, four hundred thirty-four million, three hundred twenty-four thousand, one hundred twenty-one".