211111203221113 has 16 divisors (see below), whose sum is σ = 235315501782480. Its totient is φ = 188051918374656.

The previous prime is 211111203221047. The next prime is 211111203221119. The reversal of 211111203221113 is 311122302111112.

It can be written as a sum of positive squares in 8 ways, for example, as 33887801470329 + 177223401750784 = 5821323^2 + 13312528^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211111203221113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211111203221119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148460370 + ... + 149875627.

It is an arithmetic number, because the mean of its divisors is an integer number (14707218861405).

Almost surely, 2^{211111203221113} is an apocalyptic number.

It is an amenable number.

211111203221113 is a deficient number, since it is larger than the sum of its proper divisors (24204298561367).

211111203221113 is a wasteful number, since it uses less digits than its factorization.

211111203221113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298337916.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 211111203221113 its reverse (311122302111112), we get a palindrome (522233505332225).

The spelling of 211111203221113 in words is "two hundred eleven trillion, one hundred eleven billion, two hundred three million, two hundred twenty-one thousand, one hundred thirteen".