21223210313323 has 16 divisors (see below), whose sum is σ = 21414036821760. Its totient is φ = 21032836770400.

The previous prime is 21223210313317. The next prime is 21223210313351. The reversal of 21223210313323 is 32331301232212.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21223210313323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21223210313291 and 21223210313300.

It is not an unprimeable number, because it can be changed into a prime (21223210313363) 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, 358428186 + ... + 358487392.

It is an arithmetic number, because the mean of its divisors is an integer number (1338377301360).

Almost surely, 2^{21223210313323} is an apocalyptic number.

21223210313323 is a deficient number, since it is larger than the sum of its proper divisors (190826508437).

21223210313323 is a wasteful number, since it uses less digits than its factorization.

21223210313323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62978.

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

Adding to 21223210313323 its reverse (32331301232212), we get a palindrome (53554511545535).

The spelling of 21223210313323 in words is "twenty-one trillion, two hundred twenty-three billion, two hundred ten million, three hundred thirteen thousand, three hundred twenty-three".