21103212332323 has 64 divisors (see below), whose sum is σ = 24373355673600. Its totient is φ = 18103194869760.

The previous prime is 21103212332299. The next prime is 21103212332359. The reversal of 21103212332323 is 32323321230112.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-21103212332323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21103212332291 and 21103212332300.

It is not an unprimeable number, because it can be changed into a prime (21103212332723) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 397479763 + ... + 397532851.

It is an arithmetic number, because the mean of its divisors is an integer number (380833682400).

Almost surely, 2^{21103212332323} is an apocalyptic number.

21103212332323 is a deficient number, since it is larger than the sum of its proper divisors (3270143341277).

21103212332323 is a wasteful number, since it uses less digits than its factorization.

21103212332323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53452.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 21103212332323 its reverse (32323321230112), we get a palindrome (53426533562435).

The spelling of 21103212332323 in words is "twenty-one trillion, one hundred three billion, two hundred twelve million, three hundred thirty-two thousand, three hundred twenty-three".