21320002031223 has 8 divisors (see below), whose sum is σ = 32487622142848. Its totient is φ = 12182858303544.

The previous prime is 21320002031213. The next prime is 21320002031233. The reversal of 21320002031223 is 32213020002312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21320002031213) and next prime (21320002031233).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21320002031223 - 2¹⁰ = 21320002030199 is a prime.

It is a super-2 number, since 2×21320002031223² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1015238191963 = 21320002031223 / (2 + 1 + 3 + 2 + 0 + 0 + 0 + 2 + 0 + 3 + 1 + 2 + 2 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21320002031223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320002031213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507619095961 + ... + 507619096002.

It is an arithmetic number, because the mean of its divisors is an integer number (4060952767856).

Almost surely, 2^{21320002031223} is an apocalyptic number.

21320002031223 is a deficient number, since it is larger than the sum of its proper divisors (11167620111625).

21320002031223 is a wasteful number, since it uses less digits than its factorization.

21320002031223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015238191973.

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

Adding to 21320002031223 its reverse (32213020002312), we get a palindrome (53533022033535).

The spelling of 21320002031223 in words is "twenty-one trillion, three hundred twenty billion, two million, thirty-one thousand, two hundred twenty-three".