21011330221312 has 18 divisors (see below), whose sum is σ = 41940584934458. Its totient is φ = 10505665110528.

The previous prime is 21011330221253. The next prime is 21011330221373. The reversal of 21011330221312 is 21312203311012.

It can be written as a sum of positive squares in only one way, i.e., 20991645008896 + 19685212416 = 4581664^2 + 140304^2 .

It is a congruent number.

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 as a sum of consecutive naturals, namely, 41037754083 + ... + 41037754594.

Almost surely, 2^{21011330221312} is an apocalyptic number.

It is an amenable number.

21011330221312 is a deficient number, since it is larger than the sum of its proper divisors (20929254713146).

21011330221312 is an frugal number, since it uses more digits than its factorization.

21011330221312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82075508693 (or 82075508679 counting only the distinct ones).

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

Adding to 21011330221312 its reverse (21312203311012), we get a palindrome (42323533532324).

The spelling of 21011330221312 in words is "twenty-one trillion, eleven billion, three hundred thirty million, two hundred twenty-one thousand, three hundred twelve".