12210312042 has 24 divisors (see below), whose sum is σ = 26553309120. Its totient is φ = 4055083560.

The previous prime is 12210312041. The next prime is 12210312043. The reversal of 12210312042 is 24021301221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12210312041) and next prime (12210312043).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12210312041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1246692 + ... + 1256447.

It is an arithmetic number, because the mean of its divisors is an integer number (1106387880).

Almost surely, 2^12210312042 is an apocalyptic number.

12210312042 is an abundant number, since it is smaller than the sum of its proper divisors (14342997078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12210312042 is a wasteful number, since it uses less digits than its factorization.

12210312042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2503418 (or 2503415 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12210312042 its reverse (24021301221), we get a palindrome (36231613263).

The spelling of 12210312042 in words is "twelve billion, two hundred ten million, three hundred twelve thousand, forty-two".