12213121032031 has 4 divisors (see below), whose sum is σ = 12213128083464. Its totient is φ = 12213113980600.

The previous prime is 12213121032023. The next prime is 12213121032043. The reversal of 12213121032031 is 13023012131221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12213121032031 - 2³ = 12213121032023 is a prime.

It is a super-3 number, since 3×12213121032031³ (a number of 40 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 = 12213121031993 and 12213121032011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213121033031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1063221 + ... + 5055361.

It is an arithmetic number, because the mean of its divisors is an integer number (3053282020866).

Almost surely, 2^{12213121032031} is an apocalyptic number.

12213121032031 is a deficient number, since it is larger than the sum of its proper divisors (7051433).

12213121032031 is an equidigital number, since it uses as much as digits as its factorization.

12213121032031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7051432.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 12213121032031 its reverse (13023012131221), we get a palindrome (25236133163252).

The spelling of 12213121032031 in words is "twelve trillion, two hundred thirteen billion, one hundred twenty-one million, thirty-two thousand, thirty-one".