211212183827 has 2 divisors, whose sum is σ = 211212183828. Its totient is φ = 211212183826.

The previous prime is 211212183817. The next prime is 211212183877. The reversal of 211212183827 is 728381212112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211212183827 - 2⁴ = 211212183811 is a prime.

It is a super-2 number, since 2×211212183827² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211212183817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105606091913 + 105606091914.

It is an arithmetic number, because the mean of its divisors is an integer number (105606091914).

Almost surely, 2^211212183827 is an apocalyptic number.

211212183827 is a deficient number, since it is larger than the sum of its proper divisors (1).

211212183827 is an equidigital number, since it uses as much as digits as its factorization.

211212183827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 38.

Adding to 211212183827 its reverse (728381212112), we get a palindrome (939593395939).

The spelling of 211212183827 in words is "two hundred eleven billion, two hundred twelve million, one hundred eighty-three thousand, eight hundred twenty-seven".