211242999 has 8 divisors (see below), whose sum is σ = 307262592. Its totient is φ = 128026040.

The previous prime is 211242979. The next prime is 211243031. The reversal of 211242999 is 999242112.

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

It is a cyclic number.

It is not a de Polignac number, because 211242999 - 2¹¹ = 211240951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211242929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3200619 + ... + 3200684.

It is an arithmetic number, because the mean of its divisors is an integer number (38407824).

Almost surely, 2^211242999 is an apocalyptic number.

211242999 is a deficient number, since it is larger than the sum of its proper divisors (96019593).

211242999 is a wasteful number, since it uses less digits than its factorization.

211242999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6401317.

The product of its digits is 23328, while the sum is 39.

The square root of 211242999 is about 14534.2010100315. The cubic root of 211242999 is about 595.5626333065.

The spelling of 211242999 in words is "two hundred eleven million, two hundred forty-two thousand, nine hundred ninety-nine".