211111219993 has 2 divisors, whose sum is σ = 211111219994. Its totient is φ = 211111219992.

The previous prime is 211111219981. The next prime is 211111220039. The reversal of 211111219993 is 399912111112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210761791744 + 349428249 = 459088^2 + 18693^2 .

It is a cyclic number.

It is not a de Polignac number, because 211111219993 - 2⁵ = 211111219961 is a prime.

It is not a weakly prime, because it can be changed into another prime (211111219973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105555609996 + 105555609997.

It is an arithmetic number, because the mean of its divisors is an integer number (105555609997).

Almost surely, 2^211111219993 is an apocalyptic number.

It is an amenable number.

211111219993 is a deficient number, since it is larger than the sum of its proper divisors (1).

211111219993 is an equidigital number, since it uses as much as digits as its factorization.

211111219993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 40.

The spelling of 211111219993 in words is "two hundred eleven billion, one hundred eleven million, two hundred nineteen thousand, nine hundred ninety-three".