211111219999997 has 2 divisors, whose sum is σ = 211111219999998. Its totient is φ = 211111219999996.

The previous prime is 211111219999993. The next prime is 211111220000039. The reversal of 211111219999997 is 799999912111112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132721782004036 + 78389437995961 = 11520494^2 + 8853781^2 .

It is a cyclic number.

It is not a de Polignac number, because 211111219999997 - 2² = 211111219999993 is a prime.

It is a super-3 number, since 3×211111219999997³ (a number of 44 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211111219999997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211111219999993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105555609999998 + 105555609999999.

It is an arithmetic number, because the mean of its divisors is an integer number (105555609999999).

Almost surely, 2^{211111219999997} is an apocalyptic number.

It is an amenable number.

211111219999997 is a deficient number, since it is larger than the sum of its proper divisors (1).

211111219999997 is an equidigital number, since it uses as much as digits as its factorization.

211111219999997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14880348, while the sum is 71.

The spelling of 211111219999997 in words is "two hundred eleven trillion, one hundred eleven billion, two hundred nineteen million, nine hundred ninety-nine thousand, nine hundred ninety-seven".