12212506542 has 16 divisors (see below), whose sum is σ = 24481688832. Its totient is φ = 4061389560.

The previous prime is 12212506507. The next prime is 12212506547. The reversal of 12212506542 is 24560521221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212506547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2358688 + ... + 2363859.

It is an arithmetic number, because the mean of its divisors is an integer number (1530105552).

Almost surely, 2^12212506542 is an apocalyptic number.

12212506542 is an abundant number, since it is smaller than the sum of its proper divisors (12269182290).

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

12212506542 is a wasteful number, since it uses less digits than its factorization.

12212506542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4722983.

The product of its (nonzero) digits is 9600, while the sum is 30.

The spelling of 12212506542 in words is "twelve billion, two hundred twelve million, five hundred six thousand, five hundred forty-two".