423540121305221 has 16 divisors (see below), whose sum is σ = 427796924990400. Its totient is φ = 419288920478208.

The previous prime is 423540121305187. The next prime is 423540121305247. The reversal of 423540121305221 is 122503121045324.

It is a cyclic number.

It is not a de Polignac number, because 423540121305221 - 2⁶ = 423540121305157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423540121305421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1218425786 + ... + 1218773348.

It is an arithmetic number, because the mean of its divisors is an integer number (26737307811900).

Almost surely, 2^{423540121305221} is an apocalyptic number.

It is an amenable number.

423540121305221 is a deficient number, since it is larger than the sum of its proper divisors (4256803685179).

423540121305221 is a wasteful number, since it uses less digits than its factorization.

423540121305221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355588.

The product of its (nonzero) digits is 57600, while the sum is 35.

The spelling of 423540121305221 in words is "four hundred twenty-three trillion, five hundred forty billion, one hundred twenty-one million, three hundred five thousand, two hundred twenty-one".