421120240221 has 8 divisors (see below), whose sum is σ = 561497343264. Its totient is φ = 280744982000.

The previous prime is 421120240199. The next prime is 421120240241. The reversal of 421120240221 is 122042021124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421120240221 - 2²⁷ = 420986022493 is a prime.

It is a super-2 number, since 2×421120240221² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421120240241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211675 + ... + 941831.

It is an arithmetic number, because the mean of its divisors is an integer number (70187167908).

Almost surely, 2^421120240221 is an apocalyptic number.

It is an amenable number.

421120240221 is a deficient number, since it is larger than the sum of its proper divisors (140377103043).

421120240221 is a wasteful number, since it uses less digits than its factorization.

421120240221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922411.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 421120240221 its reverse (122042021124), we get a palindrome (543162261345).

The spelling of 421120240221 in words is "four hundred twenty-one billion, one hundred twenty million, two hundred forty thousand, two hundred twenty-one".