211111227493 has 2 divisors, whose sum is σ = 211111227494. Its totient is φ = 211111227492.

The previous prime is 211111227491. The next prime is 211111227499. The reversal of 211111227493 is 394722111112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200661890209 + 10449337284 = 447953^2 + 102222^2 .

It is a cyclic number.

It is not a de Polignac number, because 211111227493 - 2¹ = 211111227491 is a prime.

Together with 211111227491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211111227491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105555613746 + 105555613747.

It is an arithmetic number, because the mean of its divisors is an integer number (105555613747).

Almost surely, 2^211111227493 is an apocalyptic number.

It is an amenable number.

211111227493 is a deficient number, since it is larger than the sum of its proper divisors (1).

211111227493 is an equidigital number, since it uses as much as digits as its factorization.

211111227493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 34.

The spelling of 211111227493 in words is "two hundred eleven billion, one hundred eleven million, two hundred twenty-seven thousand, four hundred ninety-three".