210121242 has 8 divisors (see below), whose sum is σ = 420242496. Its totient is φ = 70040412.

The previous prime is 210121217. The next prime is 210121259. The reversal of 210121242 is 242121012.

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

210121242 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 17510098 + ... + 17510109.

It is an arithmetic number, because the mean of its divisors is an integer number (52530312).

Almost surely, 2^210121242 is an apocalyptic number.

210121242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

210121242 is a wasteful number, since it uses less digits than its factorization.

210121242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35020212.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 210121242 is about 14495.5593889991. The cubic root of 210121242 is about 594.5065626322.

Adding to 210121242 its reverse (242121012), we get a palindrome (452242254).

The spelling of 210121242 in words is "two hundred ten million, one hundred twenty-one thousand, two hundred forty-two".