211421042 has 8 divisors (see below), whose sum is σ = 362436096. Its totient is φ = 90609012.

The previous prime is 211421033. The next prime is 211421053. The reversal of 211421042 is 240124112.

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 211421042.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7550738 + ... + 7550765.

It is an arithmetic number, because the mean of its divisors is an integer number (45304512).

Almost surely, 2^211421042 is an apocalyptic number.

211421042 is a deficient number, since it is larger than the sum of its proper divisors (151015054).

211421042 is a wasteful number, since it uses less digits than its factorization.

211421042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15101512.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 211421042 is about 14540.3246868837. The cubic root of 211421042 is about 595.7299066712.

Adding to 211421042 its reverse (240124112), we get a palindrome (451545154).

The spelling of 211421042 in words is "two hundred eleven million, four hundred twenty-one thousand, forty-two".