423123131421 has 12 divisors (see below), whose sum is σ = 611184746172. Its totient is φ = 282078907776.

The previous prime is 423123131413. The next prime is 423123131429. The reversal of 423123131421 is 124131321324.

423123131421 is a `hidden beast` number, since 4 + 2 + 3 + 1 + 231 + 3 + 1 + 421 = 666.

It is an interprime number because it is at equal distance from previous prime (423123131413) and next prime (423123131429).

It can be written as a sum of positive squares in 2 ways, for example, as 285492519225 + 137630612196 = 534315^2 + 370986^2 .

It is not a de Polignac number, because 423123131421 - 2³ = 423123131413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423123131429) 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, 805255 + ... + 1222571.

It is an arithmetic number, because the mean of its divisors is an integer number (50932062181).

Almost surely, 2^423123131421 is an apocalyptic number.

It is an amenable number.

423123131421 is a deficient number, since it is larger than the sum of its proper divisors (188061614751).

423123131421 is a wasteful number, since it uses less digits than its factorization.

423123131421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529980 (or 529977 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 423123131421 its reverse (124131321324), we get a palindrome (547254452745).

The spelling of 423123131421 in words is "four hundred twenty-three billion, one hundred twenty-three million, one hundred thirty-one thousand, four hundred twenty-one".