21102133231012 has 12 divisors (see below), whose sum is σ = 36928787443660. Its totient is φ = 10551051104256.

The previous prime is 21102133230991. The next prime is 21102133231013. The reversal of 21102133231012 is 21013233120112.

It can be written as a sum of positive squares in 2 ways, for example, as 15354673598016 + 5747459632996 = 3918504^2 + 2397386^2 .

It is not an unprimeable number, because it can be changed into a prime (21102133231013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 487473 + ... + 6514744.

Almost surely, 2^{21102133231012} is an apocalyptic number.

It is an amenable number.

21102133231012 is a deficient number, since it is larger than the sum of its proper divisors (15826654212648).

21102133231012 is a wasteful number, since it uses less digits than its factorization.

21102133231012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7755630 (or 7755628 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21102133231012 its reverse (21013233120112), we get a palindrome (42115366351124).

The spelling of 21102133231012 in words is "twenty-one trillion, one hundred two billion, one hundred thirty-three million, two hundred thirty-one thousand, twelve".