12021211142 has 16 divisors (see below), whose sum is σ = 18820892160. Its totient is φ = 5747721672.

The previous prime is 12021211141. The next prime is 12021211159. The reversal of 12021211142 is 24111212021.

It is a self number, because there is not a number n which added to its sum of digits gives 12021211142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021211141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146933 + ... + 213615.

It is an arithmetic number, because the mean of its divisors is an integer number (1176305760).

Almost surely, 2^12021211142 is an apocalyptic number.

12021211142 is a deficient number, since it is larger than the sum of its proper divisors (6799681018).

12021211142 is a wasteful number, since it uses less digits than its factorization.

12021211142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70627.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12021211142 its reverse (24111212021), we get a palindrome (36132423163).

The spelling of 12021211142 in words is "twelve billion, twenty-one million, two hundred eleven thousand, one hundred forty-two".