21331231404423 has 8 divisors (see below), whose sum is σ = 28586015689968. Its totient is φ = 14148634027584.

The previous prime is 21331231404407. The next prime is 21331231404437. The reversal of 21331231404423 is 32440413213312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21331231404423 - 2⁴ = 21331231404407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331231404473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18046726486 + ... + 18046727667.

It is an arithmetic number, because the mean of its divisors is an integer number (3573251961246).

Almost surely, 2^{21331231404423} is an apocalyptic number.

21331231404423 is a deficient number, since it is larger than the sum of its proper divisors (7254784285545).

21331231404423 is a wasteful number, since it uses less digits than its factorization.

21331231404423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36093454353.

The product of its (nonzero) digits is 41472, while the sum is 33.

Adding to 21331231404423 its reverse (32440413213312), we get a palindrome (53771644617735).

The spelling of 21331231404423 in words is "twenty-one trillion, three hundred thirty-one billion, two hundred thirty-one million, four hundred four thousand, four hundred twenty-three".