21131431230982 has 8 divisors (see below), whose sum is σ = 31697172611496. Its totient is φ = 10565707027152.

The previous prime is 21131431230967. The next prime is 21131431231013. The reversal of 21131431230982 is 28903213413112.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573988 + ... + 6526279.

It is an arithmetic number, because the mean of its divisors is an integer number (3962146576437).

Almost surely, 2^{21131431230982} is an apocalyptic number.

21131431230982 is a deficient number, since it is larger than the sum of its proper divisors (10565741380514).

21131431230982 is a wasteful number, since it uses less digits than its factorization.

21131431230982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8588342.

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 21131431230982 in words is "twenty-one trillion, one hundred thirty-one billion, four hundred thirty-one million, two hundred thirty thousand, nine hundred eighty-two".