21021100300232 has 8 divisors (see below), whose sum is σ = 39414563062950. Its totient is φ = 10510550150112.

The previous prime is 21021100300231. The next prime is 21021100300273. The reversal of 21021100300232 is 23200300112012.

It can be written as a sum of positive squares in only one way, i.e., 18855864567556 + 2165235732676 = 4342334^2 + 1471474^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 21021100300232.

It is not an unprimeable number, because it can be changed into a prime (21021100300231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1313818768757 + ... + 1313818768772.

Almost surely, 2^{21021100300232} is an apocalyptic number.

It is an amenable number.

21021100300232 is a deficient number, since it is larger than the sum of its proper divisors (18393462762718).

21021100300232 is a wasteful number, since it uses less digits than its factorization.

21021100300232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2627637537535 (or 2627637537531 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21021100300232 its reverse (23200300112012), we get a palindrome (44221400412244).

The spelling of 21021100300232 in words is "twenty-one trillion, twenty-one billion, one hundred million, three hundred thousand, two hundred thirty-two".