211220314187 has 2 divisors, whose sum is σ = 211220314188. Its totient is φ = 211220314186.

The previous prime is 211220314181. The next prime is 211220314259. The reversal of 211220314187 is 781413022112.

211220314187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211220314187 is a prime.

It is a super-2 number, since 2×211220314187² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211220314181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105610157093 + 105610157094.

It is an arithmetic number, because the mean of its divisors is an integer number (105610157094).

Almost surely, 2^211220314187 is an apocalyptic number.

211220314187 is a deficient number, since it is larger than the sum of its proper divisors (1).

211220314187 is an equidigital number, since it uses as much as digits as its factorization.

211220314187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 32.

Adding to 211220314187 its reverse (781413022112), we get a palindrome (992633336299).

The spelling of 211220314187 in words is "two hundred eleven billion, two hundred twenty million, three hundred fourteen thousand, one hundred eighty-seven".