211421041442 has 8 divisors (see below), whose sum is σ = 341526297756. Its totient is φ = 97578942192.

The previous prime is 211421041441. The next prime is 211421041451. The reversal of 211421041442 is 244140124112.

It can be written as a sum of positive squares in 2 ways, for example, as 199890362281 + 11530679161 = 447091^2 + 107381^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 8131578517 = 211421041442 / (2 + 1 + 1 + 4 + 2 + 1 + 0 + 4 + 1 + 4 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (211421041441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4065789233 + ... + 4065789284.

Almost surely, 2^211421041442 is an apocalyptic number.

211421041442 is a deficient number, since it is larger than the sum of its proper divisors (130105256314).

211421041442 is a wasteful number, since it uses less digits than its factorization.

211421041442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8131578532.

The product of its (nonzero) digits is 2048, while the sum is 26.

Adding to 211421041442 its reverse (244140124112), we get a palindrome (455561165554).

The spelling of 211421041442 in words is "two hundred eleven billion, four hundred twenty-one million, forty-one thousand, four hundred forty-two".