211305116666051 has 2 divisors, whose sum is σ = 211305116666052. Its totient is φ = 211305116666050.

The previous prime is 211305116666009. The next prime is 211305116666107. The reversal of 211305116666051 is 150666611503112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211305116666051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211305116665993 and 211305116666011.

It is not a weakly prime, because it can be changed into another prime (211305116666851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105652558333025 + 105652558333026.

It is an arithmetic number, because the mean of its divisors is an integer number (105652558333026).

Almost surely, 2^{211305116666051} is an apocalyptic number.

211305116666051 is a deficient number, since it is larger than the sum of its proper divisors (1).

211305116666051 is an equidigital number, since it uses as much as digits as its factorization.

211305116666051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 211305116666051 in words is "two hundred eleven trillion, three hundred five billion, one hundred sixteen million, six hundred sixty-six thousand, fifty-one".