211686538103 has 2 divisors, whose sum is σ = 211686538104. Its totient is φ = 211686538102.

The previous prime is 211686538081. The next prime is 211686538153. The reversal of 211686538103 is 301835686112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211686538103 - 2⁶ = 211686538039 is a prime.

It is a super-2 number, since 2×211686538103² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211686538153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105843269051 + 105843269052.

It is an arithmetic number, because the mean of its divisors is an integer number (105843269052).

Almost surely, 2^211686538103 is an apocalyptic number.

211686538103 is a deficient number, since it is larger than the sum of its proper divisors (1).

211686538103 is an equidigital number, since it uses as much as digits as its factorization.

211686538103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 211686538103 in words is "two hundred eleven billion, six hundred eighty-six million, five hundred thirty-eight thousand, one hundred three".