211123221347 has 2 divisors, whose sum is σ = 211123221348. Its totient is φ = 211123221346.

The previous prime is 211123221209. The next prime is 211123221359. The reversal of 211123221347 is 743122321112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211123221347 - 2¹² = 211123217251 is a prime.

It is not a weakly prime, because it can be changed into another prime (211123221847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105561610673 + 105561610674.

It is an arithmetic number, because the mean of its divisors is an integer number (105561610674).

Almost surely, 2^211123221347 is an apocalyptic number.

211123221347 is a deficient number, since it is larger than the sum of its proper divisors (1).

211123221347 is an equidigital number, since it uses as much as digits as its factorization.

211123221347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

Adding to 211123221347 its reverse (743122321112), we get a palindrome (954245542459).

The spelling of 211123221347 in words is "two hundred eleven billion, one hundred twenty-three million, two hundred twenty-one thousand, three hundred forty-seven".