211111300200221 has 4 divisors (see below), whose sum is σ = 211146096860352. Its totient is φ = 211076503540092.

The previous prime is 211111300200169. The next prime is 211111300200293. The reversal of 211111300200221 is 122002003111112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211111300200221 - 2³⁴ = 211094120331037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211111300200221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211111305200221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17398320965 + ... + 17398333098.

It is an arithmetic number, because the mean of its divisors is an integer number (52786524215088).

Almost surely, 2^{211111300200221} is an apocalyptic number.

It is an amenable number.

211111300200221 is a deficient number, since it is larger than the sum of its proper divisors (34796660131).

211111300200221 is an equidigital number, since it uses as much as digits as its factorization.

211111300200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34796660130.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 211111300200221 its reverse (122002003111112), we get a palindrome (333113303311333).

The spelling of 211111300200221 in words is "two hundred eleven trillion, one hundred eleven billion, three hundred million, two hundred thousand, two hundred twenty-one".