21103320133321 has 32 divisors (see below), whose sum is σ = 21852610560000. Its totient is φ = 20370987628992.

The previous prime is 21103320133307. The next prime is 21103320133327. The reversal of 21103320133321 is 12333102330112.

It is a cyclic number.

It is not a de Polignac number, because 21103320133321 - 2¹⁷ = 21103320002249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21103320133327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1040228440 + ... + 1040248726.

It is an arithmetic number, because the mean of its divisors is an integer number (682894080000).

Almost surely, 2^{21103320133321} is an apocalyptic number.

It is an amenable number.

21103320133321 is a deficient number, since it is larger than the sum of its proper divisors (749290426679).

21103320133321 is a wasteful number, since it uses less digits than its factorization.

21103320133321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21901.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21103320133321 its reverse (12333102330112), we get a palindrome (33436422463433).

The spelling of 21103320133321 in words is "twenty-one trillion, one hundred three billion, three hundred twenty million, one hundred thirty-three thousand, three hundred twenty-one".