21131431230333 has 8 divisors (see below), whose sum is σ = 28176543184000. Its totient is φ = 14086970048448.

The previous prime is 21131431230281. The next prime is 21131431230373. The reversal of 21131431230333 is 33303213413112.

It is a happy number.

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

It is not a de Polignac number, because 21131431230333 - 2²¹ = 21131429133181 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21131431230333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131431230373) 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, 162617173 + ... + 162747066.

It is an arithmetic number, because the mean of its divisors is an integer number (3522067898000).

Almost surely, 2^{21131431230333} is an apocalyptic number.

It is an amenable number.

21131431230333 is a deficient number, since it is larger than the sum of its proper divisors (7045111953667).

21131431230333 is a wasteful number, since it uses less digits than its factorization.

21131431230333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325385891.

The product of its (nonzero) digits is 11664, while the sum is 30.

Adding to 21131431230333 its reverse (33303213413112), we get a palindrome (54434644643445).

The spelling of 21131431230333 in words is "twenty-one trillion, one hundred thirty-one billion, four hundred thirty-one million, two hundred thirty thousand, three hundred thirty-three".