21312131103002 has 8 divisors (see below), whose sum is σ = 31968226402356. Its totient is φ = 10656055635552.

The previous prime is 21312131102981. The next prime is 21312131103013. The reversal of 21312131103002 is 20030113121312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19581430358281 + 1730700744721 = 4425091^2 + 1315561^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1892243 + ... + 6797414.

Almost surely, 2^{21312131103002} is an apocalyptic number.

21312131103002 is a deficient number, since it is larger than the sum of its proper divisors (10656095299354).

21312131103002 is a wasteful number, since it uses less digits than its factorization.

21312131103002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9915952.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21312131103002 its reverse (20030113121312), we get a palindrome (41342244224314).

The spelling of 21312131103002 in words is "twenty-one trillion, three hundred twelve billion, one hundred thirty-one million, one hundred three thousand, two".