423421202131 has 4 divisors (see below), whose sum is σ = 425192839200. Its totient is φ = 421649565064.

The previous prime is 423421202111. The next prime is 423421202137. The reversal of 423421202131 is 131202124324.

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

It is a cyclic number.

It is not a de Polignac number, because 423421202131 - 2⁷ = 423421202003 is a prime.

It is a super-2 number, since 2×423421202131² (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 = 423421202096 and 423421202105.

It is not an unprimeable number, because it can be changed into a prime (423421202137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 885818176 + ... + 885818653.

It is an arithmetic number, because the mean of its divisors is an integer number (106298209800).

Almost surely, 2^423421202131 is an apocalyptic number.

423421202131 is a deficient number, since it is larger than the sum of its proper divisors (1771637069).

423421202131 is a wasteful number, since it uses less digits than its factorization.

423421202131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771637068.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 423421202131 its reverse (131202124324), we get a palindrome (554623326455).

The spelling of 423421202131 in words is "four hundred twenty-three billion, four hundred twenty-one million, two hundred two thousand, one hundred thirty-one".