211243124021 has 8 divisors (see below), whose sum is σ = 222391408320. Its totient is φ = 200097862272.

The previous prime is 211243123999. The next prime is 211243124039. The reversal of 211243124021 is 120421342112.

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 211243124021 - 2¹⁰ = 211243122997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211243124041) 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 7 ways as a sum of consecutive naturals, for example, 611465 + ... + 892398.

It is an arithmetic number, because the mean of its divisors is an integer number (27798926040).

Almost surely, 2^211243124021 is an apocalyptic number.

It is an amenable number.

211243124021 is a deficient number, since it is larger than the sum of its proper divisors (11148284299).

211243124021 is a wasteful number, since it uses less digits than its factorization.

211243124021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511275.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 211243124021 its reverse (120421342112), we get a palindrome (331664466133).

The spelling of 211243124021 in words is "two hundred eleven billion, two hundred forty-three million, one hundred twenty-four thousand, twenty-one".