21101033203321 has 16 divisors (see below), whose sum is σ = 21545578454400. Its totient is φ = 20660892134400.

The previous prime is 21101033203307. The next prime is 21101033203331. The reversal of 21101033203321 is 12330233010112.

It is a cyclic number.

It is not a de Polignac number, because 21101033203321 - 2¹⁹ = 21101032679033 is a prime.

It is a super-3 number, since 3×21101033203321³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21101033203292 and 21101033203301.

It is not an unprimeable number, because it can be changed into a prime (21101033203331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8385945 + ... + 10607833.

It is an arithmetic number, because the mean of its divisors is an integer number (1346598653400).

Almost surely, 2^{21101033203321} is an apocalyptic number.

It is an amenable number.

21101033203321 is a deficient number, since it is larger than the sum of its proper divisors (444545251079).

21101033203321 is a wasteful number, since it uses less digits than its factorization.

21101033203321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222880.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21101033203321 its reverse (12330233010112), we get a palindrome (33431266213433).

The spelling of 21101033203321 in words is "twenty-one trillion, one hundred one billion, thirty-three million, two hundred three thousand, three hundred twenty-one".