21031002203323 has 16 divisors (see below), whose sum is σ = 24066992715264. Its totient is φ = 18002904050880.

The previous prime is 21031002203293. The next prime is 21031002203329. The reversal of 21031002203323 is 32330220013012.

It is a de Polignac number, because none of the positive numbers 2^k-21031002203323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21031002203294 and 21031002203303.

It is not an unprimeable number, because it can be changed into a prime (21031002203329) 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, 157661511 + ... + 157794847.

It is an arithmetic number, because the mean of its divisors is an integer number (1504187044704).

Almost surely, 2^{21031002203323} is an apocalyptic number.

21031002203323 is a deficient number, since it is larger than the sum of its proper divisors (3035990511941).

21031002203323 is a wasteful number, since it uses less digits than its factorization.

21031002203323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162762.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21031002203323 its reverse (32330220013012), we get a palindrome (53361222216335).

The spelling of 21031002203323 in words is "twenty-one trillion, thirty-one billion, two million, two hundred three thousand, three hundred twenty-three".