211100131 has 4 divisors (see below), whose sum is σ = 230291064. Its totient is φ = 191909200.

The previous prime is 211100129. The next prime is 211100137. The reversal of 211100131 is 131001112.

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

It is a cyclic number.

It is not a de Polignac number, because 211100131 - 2¹ = 211100129 is a prime.

It is a super-2 number, since 2×211100131² = 89126530616434322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211100137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9595450 + ... + 9595471.

It is an arithmetic number, because the mean of its divisors is an integer number (57572766).

Almost surely, 2^211100131 is an apocalyptic number.

211100131 is a deficient number, since it is larger than the sum of its proper divisors (19190933).

211100131 is a wasteful number, since it uses less digits than its factorization.

211100131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19190932.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 211100131 is about 14529.2852886851. The cubic root of 211100131 is about 595.4283392598.

Adding to 211100131 its reverse (131001112), we get a palindrome (342101243).

The spelling of 211100131 in words is "two hundred eleven million, one hundred thousand, one hundred thirty-one".