221221432230023 has 4 divisors (see below), whose sum is σ = 223502065552080. Its totient is φ = 218940798907968.

The previous prime is 221221432229983. The next prime is 221221432230079. The reversal of 221221432230023 is 320032234122122.

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 221221432230023 - 2¹⁶ = 221221432164487 is a prime.

It is a super-3 number, since 3×221221432230023³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221221432230923) 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, 1140316660883 + ... + 1140316661076.

It is an arithmetic number, because the mean of its divisors is an integer number (55875516388020).

Almost surely, 2^{221221432230023} is an apocalyptic number.

221221432230023 is a deficient number, since it is larger than the sum of its proper divisors (2280633322057).

221221432230023 is an equidigital number, since it uses as much as digits as its factorization.

221221432230023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2280633322056.

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

Adding to 221221432230023 its reverse (320032234122122), we get a palindrome (541253666352145).

The spelling of 221221432230023 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, four hundred thirty-two million, two hundred thirty thousand, twenty-three".