211144113491 has 2 divisors, whose sum is σ = 211144113492. Its totient is φ = 211144113490.

The previous prime is 211144113421. The next prime is 211144113497. The reversal of 211144113491 is 194311441112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211144113491 is a prime.

It is not a weakly prime, because it can be changed into another prime (211144113497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105572056745 + 105572056746.

It is an arithmetic number, because the mean of its divisors is an integer number (105572056746).

Almost surely, 2^211144113491 is an apocalyptic number.

211144113491 is a deficient number, since it is larger than the sum of its proper divisors (1).

211144113491 is an equidigital number, since it uses as much as digits as its factorization.

211144113491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 32.

The spelling of 211144113491 in words is "two hundred eleven billion, one hundred forty-four million, one hundred thirteen thousand, four hundred ninety-one".