421031123231 has 4 divisors (see below), whose sum is σ = 426360631200. Its totient is φ = 415701615264.

The previous prime is 421031123213. The next prime is 421031123243. The reversal of 421031123231 is 132321130124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421031123231 is a prime.

It is a super-2 number, since 2×421031123231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421031123197 and 421031123206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421031120231) 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, 2664753866 + ... + 2664754023.

It is an arithmetic number, because the mean of its divisors is an integer number (106590157800).

Almost surely, 2^421031123231 is an apocalyptic number.

421031123231 is a deficient number, since it is larger than the sum of its proper divisors (5329507969).

421031123231 is an equidigital number, since it uses as much as digits as its factorization.

421031123231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5329507968.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 421031123231 its reverse (132321130124), we get a palindrome (553352253355).

The spelling of 421031123231 in words is "four hundred twenty-one billion, thirty-one million, one hundred twenty-three thousand, two hundred thirty-one".