423113121220 has 24 divisors (see below), whose sum is σ = 891054672984. Its totient is φ = 168765797376.

The previous prime is 423113121187. The next prime is 423113121229. The reversal of 423113121220 is 22121311324.

It can be written as a sum of positive squares in 4 ways, for example, as 144143234244 + 278969886976 = 379662^2 + 528176^2 .

It is a junction number, because it is equal to n+sod(n) for n = 423113121191 and 423113121200.

It is not an unprimeable number, because it can be changed into a prime (423113121229) 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 7 ways as a sum of consecutive naturals, for example, 29958459 + ... + 29972578.

It is an arithmetic number, because the mean of its divisors is an integer number (37127278041).

Almost surely, 2^423113121220 is an apocalyptic number.

It is an amenable number.

423113121220 is an abundant number, since it is smaller than the sum of its proper divisors (467941551764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

423113121220 is a wasteful number, since it uses less digits than its factorization.

423113121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59931399 (or 59931397 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 423113121220 its reverse (22121311324), we get a palindrome (445234432544).

The spelling of 423113121220 in words is "four hundred twenty-three billion, one hundred thirteen million, one hundred twenty-one thousand, two hundred twenty".