211863680030687 has 2 divisors, whose sum is σ = 211863680030688. Its totient is φ = 211863680030686.

The previous prime is 211863680030677. The next prime is 211863680030773. The reversal of 211863680030687 is 786030086368112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211863680030687 - 2²⁶ = 211863612921823 is a prime.

It is a super-2 number, since 2×211863680030687² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211863680030677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105931840015343 + 105931840015344.

It is an arithmetic number, because the mean of its divisors is an integer number (105931840015344).

Almost surely, 2^{211863680030687} is an apocalyptic number.

211863680030687 is a deficient number, since it is larger than the sum of its proper divisors (1).

211863680030687 is an equidigital number, since it uses as much as digits as its factorization.

211863680030687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13934592, while the sum is 59.

The spelling of 211863680030687 in words is "two hundred eleven trillion, eight hundred sixty-three billion, six hundred eighty million, thirty thousand, six hundred eighty-seven".