21031320002223 has 32 divisors (see below), whose sum is σ = 29762923322880. Its totient is φ = 13164286924800.

The previous prime is 21031320002191. The next prime is 21031320002233. The reversal of 21031320002223 is 32220002313012.

It is a happy number.

It is not a de Polignac number, because 21031320002223 - 2⁵ = 21031320002191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21031320002223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031320002233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176970423 + ... + 177089223.

It is an arithmetic number, because the mean of its divisors is an integer number (930091353840).

Almost surely, 2^{21031320002223} is an apocalyptic number.

21031320002223 is a deficient number, since it is larger than the sum of its proper divisors (8731603320657).

21031320002223 is a wasteful number, since it uses less digits than its factorization.

21031320002223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127167.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21031320002223 its reverse (32220002313012), we get a palindrome (53251322315235).

The spelling of 21031320002223 in words is "twenty-one trillion, thirty-one billion, three hundred twenty million, two thousand, two hundred twenty-three".