2111344643 has 2 divisors, whose sum is σ = 2111344644. Its totient is φ = 2111344642.

The previous prime is 2111344637. The next prime is 2111344649. The reversal of 2111344643 is 3464431112.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (2111344637) and next prime (2111344649).

It is a cyclic number.

It is not a de Polignac number, because 2111344643 - 2¹⁸ = 2111082499 is a prime.

It is not a weakly prime, because it can be changed into another prime (2111344649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055672321 + 1055672322.

It is an arithmetic number, because the mean of its divisors is an integer number (1055672322).

Almost surely, 2^2111344643 is an apocalyptic number.

2111344643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111344643 is an equidigital number, since it uses as much as digits as its factorization.

2111344643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 29.

The square root of 2111344643 is about 45949.3704309428. The cubic root of 2111344643 is about 1282.8810111941.

Adding to 2111344643 its reverse (3464431112), we get a palindrome (5575775755).

It can be divided in two parts, 21113 and 44643, that added together give a palindrome (65756).

The spelling of 2111344643 in words is "two billion, one hundred eleven million, three hundred forty-four thousand, six hundred forty-three".