421243203231 has 12 divisors (see below), whose sum is σ = 618775327560. Its totient is φ = 276068991600.

The previous prime is 421243203221. The next prime is 421243203281. The reversal of 421243203231 is 132302342124.

421243203231 is a `hidden beast` number, since 4 + 2 + 12 + 4 + 320 + 323 + 1 = 666.

It is not a de Polignac number, because 421243203231 - 2³¹ = 419095719583 is a prime.

It is a super-2 number, since 2×421243203231² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421243203195 and 421243203204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421243203221) 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, 396650320 + ... + 396651381.

It is an arithmetic number, because the mean of its divisors is an integer number (51564610630).

Almost surely, 2^421243203231 is an apocalyptic number.

421243203231 is a deficient number, since it is larger than the sum of its proper divisors (197532124329).

421243203231 is a wasteful number, since it uses less digits than its factorization.

421243203231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793301766 (or 793301763 counting only the distinct ones).

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

Adding to 421243203231 its reverse (132302342124), we get a palindrome (553545545355).

The spelling of 421243203231 in words is "four hundred twenty-one billion, two hundred forty-three million, two hundred three thousand, two hundred thirty-one".