21023211201323 has 16 divisors (see below), whose sum is σ = 21787224480000. Its totient is φ = 20261807419392.

The previous prime is 21023211201313. The next prime is 21023211201337. The reversal of 21023211201323 is 32310211232012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21023211201323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21023211201313) 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, 361386983 + ... + 361445151.

It is an arithmetic number, because the mean of its divisors is an integer number (1361701530000).

Almost surely, 2^{21023211201323} is an apocalyptic number.

21023211201323 is a deficient number, since it is larger than the sum of its proper divisors (764013278677).

21023211201323 is a wasteful number, since it uses less digits than its factorization.

21023211201323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80374.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21023211201323 its reverse (32310211232012), we get a palindrome (53333422433335).

The spelling of 21023211201323 in words is "twenty-one trillion, twenty-three billion, two hundred eleven million, two hundred one thousand, three hundred twenty-three".