21321033220103 has 16 divisors (see below), whose sum is σ = 21647189813760. Its totient is φ = 20996295216000.

The previous prime is 21321033220099. The next prime is 21321033220111. The reversal of 21321033220103 is 30102233012312.

It is a cyclic number.

It is not a de Polignac number, because 21321033220103 - 2² = 21321033220099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321033220153) 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, 327243176 + ... + 327308322.

It is an arithmetic number, because the mean of its divisors is an integer number (1352949363360).

Almost surely, 2^{21321033220103} is an apocalyptic number.

21321033220103 is a deficient number, since it is larger than the sum of its proper divisors (326156593657).

21321033220103 is a wasteful number, since it uses less digits than its factorization.

21321033220103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75958.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21321033220103 its reverse (30102233012312), we get a palindrome (51423266232415).

The spelling of 21321033220103 in words is "twenty-one trillion, three hundred twenty-one billion, thirty-three million, two hundred twenty thousand, one hundred three".