423044120321221 has 16 divisors (see below), whose sum is σ = 499076603117568. Its totient is φ = 350911110510000.

The previous prime is 423044120321189. The next prime is 423044120321267. The reversal of 423044120321221 is 122123021440324.

It is a cyclic number.

It is not a de Polignac number, because 423044120321221 - 2⁵ = 423044120321189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423044120321021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73381596 + ... + 78936346.

It is an arithmetic number, because the mean of its divisors is an integer number (31192287694848).

Almost surely, 2^{423044120321221} is an apocalyptic number.

It is an amenable number.

423044120321221 is a deficient number, since it is larger than the sum of its proper divisors (76032482796347).

423044120321221 is a wasteful number, since it uses less digits than its factorization.

423044120321221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5905752.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 423044120321221 its reverse (122123021440324), we get a palindrome (545167141761545).

The spelling of 423044120321221 in words is "four hundred twenty-three trillion, forty-four billion, one hundred twenty million, three hundred twenty-one thousand, two hundred twenty-one".