21331103223031 has 8 divisors (see below), whose sum is σ = 24778049645984. Its totient is φ = 17984068290720.

The previous prime is 21331103223019. The next prime is 21331103223047. The reversal of 21331103223031 is 13032230113312.

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

It is not a de Polignac number, because 21331103223031 - 2⁵ = 21331103222999 is a prime.

It is a super-2 number, since 2×21331103223031² (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 = 21331103222987 and 21331103223005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331103221031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24977872200 + ... + 24977873053.

It is an arithmetic number, because the mean of its divisors is an integer number (3097256205748).

Almost surely, 2^{21331103223031} is an apocalyptic number.

21331103223031 is a deficient number, since it is larger than the sum of its proper divisors (3446946422953).

21331103223031 is an equidigital number, since it uses as much as digits as its factorization.

21331103223031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49955745321.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21331103223031 its reverse (13032230113312), we get a palindrome (34363333336343).

The spelling of 21331103223031 in words is "twenty-one trillion, three hundred thirty-one billion, one hundred three million, two hundred twenty-three thousand, thirty-one".