211242130221 has 8 divisors (see below), whose sum is σ = 281660822560. Its totient is φ = 140825762352.

The previous prime is 211242130217. The next prime is 211242130247. The reversal of 211242130221 is 122031242112.

It is a happy number.

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

It is not a de Polignac number, because 211242130221 - 2² = 211242130217 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 (211242130291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356686 + ... + 741423.

It is an arithmetic number, because the mean of its divisors is an integer number (35207602820).

Almost surely, 2^211242130221 is an apocalyptic number.

It is an amenable number.

211242130221 is a deficient number, since it is larger than the sum of its proper divisors (70418692339).

211242130221 is a wasteful number, since it uses less digits than its factorization.

211242130221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162235.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 211242130221 its reverse (122031242112), we get a palindrome (333273372333).

The spelling of 211242130221 in words is "two hundred eleven billion, two hundred forty-two million, one hundred thirty thousand, two hundred twenty-one".