21331103112331 has 4 divisors (see below), whose sum is σ = 21331225660464. Its totient is φ = 21330980564200.

The previous prime is 21331103112289. The next prime is 21331103112413. The reversal of 21331103112331 is 13321130113312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21331103112331 - 2⁷ = 21331103112203 is a prime.

It is a super-3 number, since 3×21331103112331³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21331103112296 and 21331103112305.

It is not an unprimeable number, because it can be changed into a prime (21331103142331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61012600 + ... + 61361221.

It is an arithmetic number, because the mean of its divisors is an integer number (5332806415116).

Almost surely, 2^{21331103112331} is an apocalyptic number.

21331103112331 is a deficient number, since it is larger than the sum of its proper divisors (122548133).

21331103112331 is a wasteful number, since it uses less digits than its factorization.

21331103112331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122548132.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 21331103112331 its reverse (13321130113312), we get a palindrome (34652233225643).

The spelling of 21331103112331 in words is "twenty-one trillion, three hundred thirty-one billion, one hundred three million, one hundred twelve thousand, three hundred thirty-one".