423240500132221 has 4 divisors (see below), whose sum is σ = 425686977011772. Its totient is φ = 420794023252672.

The previous prime is 423240500132201. The next prime is 423240500132257. The reversal of 423240500132221 is 122231005042324.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 270560225151225 + 152680274980996 = 16448715^2 + 12356386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423240500132221 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 (423240500132201) 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, 1223238439516 + ... + 1223238439861.

It is an arithmetic number, because the mean of its divisors is an integer number (106421744252943).

Almost surely, 2^{423240500132221} is an apocalyptic number.

It is an amenable number.

423240500132221 is a deficient number, since it is larger than the sum of its proper divisors (2446476879551).

423240500132221 is a wasteful number, since it uses less digits than its factorization.

423240500132221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2446476879550.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 423240500132221 its reverse (122231005042324), we get a palindrome (545471505174545).

The spelling of 423240500132221 in words is "four hundred twenty-three trillion, two hundred forty billion, five hundred million, one hundred thirty-two thousand, two hundred twenty-one".