21203313132323 has 16 divisors (see below), whose sum is σ = 24329307821760. Its totient is φ = 18101571403776.

The previous prime is 21203313132299. The next prime is 21203313132361. The reversal of 21203313132323 is 32323131330212.

It is not a de Polignac number, because 21203313132323 - 2¹² = 21203313128227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21203313132523) 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, 15927065 + ... + 17206917.

It is an arithmetic number, because the mean of its divisors is an integer number (1520581738860).

Almost surely, 2^{21203313132323} is an apocalyptic number.

21203313132323 is a deficient number, since it is larger than the sum of its proper divisors (3125994689437).

21203313132323 is a wasteful number, since it uses less digits than its factorization.

21203313132323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289326.

The product of its (nonzero) digits is 11664, while the sum is 29.

Adding to 21203313132323 its reverse (32323131330212), we get a palindrome (53526444462535).

The spelling of 21203313132323 in words is "twenty-one trillion, two hundred three billion, three hundred thirteen million, one hundred thirty-two thousand, three hundred twenty-three".