331234021423 has 4 divisors (see below), whose sum is σ = 341918989888. Its totient is φ = 320549052960.

The previous prime is 331234021373. The next prime is 331234021453. The reversal of 331234021423 is 324120432133.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324120432133 = 443 ⋅731648831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331234021423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331234021391 and 331234021400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331234021453) 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, 5342484186 + ... + 5342484247.

It is an arithmetic number, because the mean of its divisors is an integer number (85479747472).

Almost surely, 2^331234021423 is an apocalyptic number.

331234021423 is a deficient number, since it is larger than the sum of its proper divisors (10684968465).

331234021423 is a wasteful number, since it uses less digits than its factorization.

331234021423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10684968464.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 331234021423 its reverse (324120432133), we get a palindrome (655354453556).

The spelling of 331234021423 in words is "three hundred thirty-one billion, two hundred thirty-four million, twenty-one thousand, four hundred twenty-three".