21011233321323 has 36 divisors (see below), whose sum is σ = 35562287156760. Its totient is φ = 11918780911296.

The previous prime is 21011233321319. The next prime is 21011233321363. The reversal of 21011233321323 is 32312333211012.

21011233321323 is a `hidden beast` number, since 2 + 1 + 0 + 1 + 1 + 2 + 3 + 332 + 1 + 323 = 666.

It is not a de Polignac number, because 21011233321323 - 2² = 21011233321319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21011233321303) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 173824693 + ... + 173945526.

It is an arithmetic number, because the mean of its divisors is an integer number (987841309910).

Almost surely, 2^{21011233321323} is an apocalyptic number.

21011233321323 is a deficient number, since it is larger than the sum of its proper divisors (14551053835437).

21011233321323 is a wasteful number, since it uses less digits than its factorization.

21011233321323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347770376 (or 347770366 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 21011233321323 its reverse (32312333211012), we get a palindrome (53323566532335).

The spelling of 21011233321323 in words is "twenty-one trillion, eleven billion, two hundred thirty-three million, three hundred twenty-one thousand, three hundred twenty-three".