211131211142 has 8 divisors (see below), whose sum is σ = 317593975896. Its totient is φ = 105266552512.

The previous prime is 211131211141. The next prime is 211131211189. The reversal of 211131211142 is 241112131112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211131211141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149525648 + ... + 149527059.

It is an arithmetic number, because the mean of its divisors is an integer number (39699246987).

Almost surely, 2^211131211142 is an apocalyptic number.

211131211142 is a deficient number, since it is larger than the sum of its proper divisors (106462764754).

211131211142 is a wasteful number, since it uses less digits than its factorization.

211131211142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299053062.

The product of its digits is 96, while the sum is 20.

Adding to 211131211142 its reverse (241112131112), we get a palindrome (452243342254).

The spelling of 211131211142 in words is "two hundred eleven billion, one hundred thirty-one million, two hundred eleven thousand, one hundred forty-two".