221034430121 has 8 divisors (see below), whose sum is σ = 232754272320. Its totient is φ = 209323233072.

The previous prime is 221034430103. The next prime is 221034430153. The reversal of 221034430121 is 121034430122.

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-221034430121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221034430171) 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, 2108765 + ... + 2211098.

It is an arithmetic number, because the mean of its divisors is an integer number (29094284040).

Almost surely, 2^221034430121 is an apocalyptic number.

It is an amenable number.

221034430121 is a deficient number, since it is larger than the sum of its proper divisors (11719842199).

221034430121 is a wasteful number, since it uses less digits than its factorization.

221034430121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4322575.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 221034430121 its reverse (121034430122), we get a palindrome (342068860243).

Subtracting from 221034430121 its reverse (121034430122), we obtain a palindrome (99999999999).

The spelling of 221034430121 in words is "two hundred twenty-one billion, thirty-four million, four hundred thirty thousand, one hundred twenty-one".