423220133421 has 12 divisors (see below), whose sum is σ = 611402002848. Its totient is φ = 282107971464.

The previous prime is 423220133419. The next prime is 423220133429. The reversal of 423220133421 is 124331022324.

423220133421 is a `hidden beast` number, since 4 + 2 + 3 + 2 + 201 + 33 + 421 = 666.

It is not a de Polignac number, because 423220133421 - 2¹ = 423220133419 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423220133429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3162825 + ... + 3293918.

It is an arithmetic number, because the mean of its divisors is an integer number (50950166904).

Almost surely, 2^423220133421 is an apocalyptic number.

It is an amenable number.

423220133421 is a deficient number, since it is larger than the sum of its proper divisors (188181869427).

423220133421 is a wasteful number, since it uses less digits than its factorization.

423220133421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6464032 (or 6464029 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 423220133421 its reverse (124331022324), we get a palindrome (547551155745).

The spelling of 423220133421 in words is "four hundred twenty-three billion, two hundred twenty million, one hundred thirty-three thousand, four hundred twenty-one".