211123142 has 8 divisors (see below), whose sum is σ = 318628056. Its totient is φ = 104913792.

The previous prime is 211123139. The next prime is 211123169. The reversal of 211123142 is 241321112.

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

It is a self number, because there is not a number n which added to its sum of digits gives 211123142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323483 + ... + 324134.

It is an arithmetic number, because the mean of its divisors is an integer number (39828507).

Almost surely, 2^211123142 is an apocalyptic number.

211123142 is a deficient number, since it is larger than the sum of its proper divisors (107504914).

211123142 is a wasteful number, since it uses less digits than its factorization.

211123142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647782.

The product of its digits is 96, while the sum is 17.

The square root of 211123142 is about 14530.0771505178. The cubic root of 211123142 is about 595.4499733909.

Adding to 211123142 its reverse (241321112), we get a palindrome (452444254).

The spelling of 211123142 in words is "two hundred eleven million, one hundred twenty-three thousand, one hundred forty-two".