221214242423 has 4 divisors (see below), whose sum is σ = 225920928480. Its totient is φ = 216507556368.

The previous prime is 221214242339. The next prime is 221214242479. The reversal of 221214242423 is 324242412122.

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 221214242423 - 2¹² = 221214238327 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 (221214244423) 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, 2353342958 + ... + 2353343051.

It is an arithmetic number, because the mean of its divisors is an integer number (56480232120).

Almost surely, 2^221214242423 is an apocalyptic number.

221214242423 is a deficient number, since it is larger than the sum of its proper divisors (4706686057).

221214242423 is an equidigital number, since it uses as much as digits as its factorization.

221214242423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4706686056.

The product of its digits is 12288, while the sum is 29.

Adding to 221214242423 its reverse (324242412122), we get a palindrome (545456654545).

The spelling of 221214242423 in words is "two hundred twenty-one billion, two hundred fourteen million, two hundred forty-two thousand, four hundred twenty-three".