21303220000031 has 8 divisors (see below), whose sum is σ = 21352851325344. Its totient is φ = 21253603482720.

The previous prime is 21303220000003. The next prime is 21303220000057. The reversal of 21303220000031 is 13000002230312.

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

It is a cyclic number.

It is not a de Polignac number, because 21303220000031 - 2³⁰ = 21302146258207 is a prime.

It is a super-2 number, since 2×21303220000031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21303219999964 and 21303220000009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303220000081) 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, 818780 + ... + 6578513.

It is an arithmetic number, because the mean of its divisors is an integer number (2669106415668).

Almost surely, 2^{21303220000031} is an apocalyptic number.

21303220000031 is a deficient number, since it is larger than the sum of its proper divisors (49631325313).

21303220000031 is an equidigital number, since it uses as much as digits as its factorization.

21303220000031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7404001.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21303220000031 its reverse (13000002230312), we get a palindrome (34303222230343).

The spelling of 21303220000031 in words is "twenty-one trillion, three hundred three billion, two hundred twenty million, thirty-one", and thus it is an aban number.