211201100112221 has 4 divisors (see below), whose sum is σ = 214780779775200. Its totient is φ = 207621420449244.

The previous prime is 211201100112209. The next prime is 211201100112257. The reversal of 211201100112221 is 122211001102112.

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 a de Polignac number, because none of the positive numbers 2^k-211201100112221 is a prime.

It is a super-2 number, since 2×211201100112221² (a number of 29 digits) contains 22 as substring.

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 211201100112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211201100115221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1789839831401 + ... + 1789839831518.

It is an arithmetic number, because the mean of its divisors is an integer number (53695194943800).

Almost surely, 2^{211201100112221} is an apocalyptic number.

It is an amenable number.

211201100112221 is a deficient number, since it is larger than the sum of its proper divisors (3579679662979).

211201100112221 is an equidigital number, since it uses as much as digits as its factorization.

211201100112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3579679662978.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 211201100112221 its reverse (122211001102112), we get a palindrome (333412101214333).

The spelling of 211201100112221 in words is "two hundred eleven trillion, two hundred one billion, one hundred million, one hundred twelve thousand, two hundred twenty-one".