421530211420 has 12 divisors (see below), whose sum is σ = 885213444024. Its totient is φ = 168612084560.

The previous prime is 421530211397. The next prime is 421530211423. The reversal of 421530211420 is 24112035124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421530211423) 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, 10538255266 + ... + 10538255305.

It is an arithmetic number, because the mean of its divisors is an integer number (73767787002).

Almost surely, 2^421530211420 is an apocalyptic number.

It is an amenable number.

421530211420 is an abundant number, since it is smaller than the sum of its proper divisors (463683232604).

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

421530211420 is a wasteful number, since it uses less digits than its factorization.

421530211420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21076510580 (or 21076510578 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 421530211420 its reverse (24112035124), we get a palindrome (445642246544).

The spelling of 421530211420 in words is "four hundred twenty-one billion, five hundred thirty million, two hundred eleven thousand, four hundred twenty".