211042042 has 8 divisors (see below), whose sum is σ = 316981332. Its totient is φ = 105381600.

The previous prime is 211042037. The next prime is 211042057. The reversal of 211042042 is 240240112.

It can be written as a sum of positive squares in 2 ways, for example, as 208542481 + 2499561 = 14441^2 + 1581^2 .

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

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, 67809 + ... + 70852.

Almost surely, 2^211042042 is an apocalyptic number.

211042042 is a deficient number, since it is larger than the sum of its proper divisors (105939290).

211042042 is a wasteful number, since it uses less digits than its factorization.

211042042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139424.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 211042042 is about 14527.2861195751. The cubic root of 211042042 is about 595.3737190350.

Adding to 211042042 its reverse (240240112), we get a palindrome (451282154).

The spelling of 211042042 in words is "two hundred eleven million, forty-two thousand, forty-two".