211131311101 has 4 divisors (see below), whose sum is σ = 211546107900. Its totient is φ = 210716514304.

The previous prime is 211131311089. The next prime is 211131311107. The reversal of 211131311101 is 101113131112.

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 171868284900 + 39263026201 = 414570^2 + 198149^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211131311101 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 (211131311107) 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, 207397636 + ... + 207398653.

It is an arithmetic number, because the mean of its divisors is an integer number (52886526975).

Almost surely, 2^211131311101 is an apocalyptic number.

It is an amenable number.

211131311101 is a deficient number, since it is larger than the sum of its proper divisors (414796799).

211131311101 is an equidigital number, since it uses as much as digits as its factorization.

211131311101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414796798.

The product of its (nonzero) digits is 18, while the sum is 16.

Adding to 211131311101 its reverse (101113131112), we get a palindrome (312244442213).

The spelling of 211131311101 in words is "two hundred eleven billion, one hundred thirty-one million, three hundred eleven thousand, one hundred one".