211111210201 has 4 divisors (see below), whose sum is σ = 211453368372. Its totient is φ = 210769052032.

The previous prime is 211111210199. The next prime is 211111210223. The reversal of 211111210201 is 102012111112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31101086025 + 180010124176 = 176355^2 + 424276^2 .

It is a cyclic number.

It is not a de Polignac number, because 211111210201 - 2¹ = 211111210199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211111210001) 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, 171078160 + ... + 171079393.

It is an arithmetic number, because the mean of its divisors is an integer number (52863342093).

Almost surely, 2^211111210201 is an apocalyptic number.

It is an amenable number.

211111210201 is a deficient number, since it is larger than the sum of its proper divisors (342158171).

211111210201 is an equidigital number, since it uses as much as digits as its factorization.

211111210201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342158170.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 211111210201 its reverse (102012111112), we get a palindrome (313123321313).

It can be divided in two parts, 2111112 and 10201, that multiplied together give a palindrome (21535453512).

The spelling of 211111210201 in words is "two hundred eleven billion, one hundred eleven million, two hundred ten thousand, two hundred one".