12031221222999 has 64 divisors (see below), whose sum is σ = 20321173831680. Its totient is φ = 6963838500960.

The previous prime is 12031221222991. The next prime is 12031221223003. The reversal of 12031221222999 is 99922212213021.

12031221222999 is a `hidden beast` number, since 1 + 2 + 0 + 312 + 21 + 2 + 229 + 99 = 666.

It is not a de Polignac number, because 12031221222999 - 2³ = 12031221222991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031221222991) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3058554 + ... + 5780760.

It is an arithmetic number, because the mean of its divisors is an integer number (317518341120).

Almost surely, 2^{12031221222999} is an apocalyptic number.

12031221222999 is a deficient number, since it is larger than the sum of its proper divisors (8289952608681).

12031221222999 is a wasteful number, since it uses less digits than its factorization.

12031221222999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2722897 (or 2722891 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

It can be divided in two parts, 120312 and 21222999, that added together give a triangular number (21343311 = T₆₅₃₃).

The spelling of 12031221222999 in words is "twelve trillion, thirty-one billion, two hundred twenty-one million, two hundred twenty-two thousand, nine hundred ninety-nine".