221432234123 has 4 divisors (see below), whose sum is σ = 221515388208. Its totient is φ = 221349080040.

The previous prime is 221432234099. The next prime is 221432234161. The reversal of 221432234123 is 321432234122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221432234123 - 2¹² = 221432230027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221432254123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41573048 + ... + 41578373.

It is an arithmetic number, because the mean of its divisors is an integer number (55378847052).

Almost surely, 2^221432234123 is an apocalyptic number.

221432234123 is a deficient number, since it is larger than the sum of its proper divisors (83154085).

221432234123 is an equidigital number, since it uses as much as digits as its factorization.

221432234123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83154084.

The product of its digits is 13824, while the sum is 29.

Adding to 221432234123 its reverse (321432234122), we get a palindrome (542864468245).

Subtracting 221432234123 from its reverse (321432234122), we obtain a palindrome (99999999999).

The spelling of 221432234123 in words is "two hundred twenty-one billion, four hundred thirty-two million, two hundred thirty-four thousand, one hundred twenty-three".