2111320481 has 2 divisors, whose sum is σ = 2111320482. Its totient is φ = 2111320480.

The previous prime is 2111320447. The next prime is 2111320493. The reversal of 2111320481 is 1840231112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1780080481 + 331240000 = 42191^2 + 18200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2111320481 is a prime.

It is a super-2 number, since 2×2111320481² = 8915348346980142722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2111320411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055660240 + 1055660241.

It is an arithmetic number, because the mean of its divisors is an integer number (1055660241).

Almost surely, 2^2111320481 is an apocalyptic number.

It is an amenable number.

2111320481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111320481 is an equidigital number, since it uses as much as digits as its factorization.

2111320481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 2111320481 is about 45949.1075103750. The cubic root of 2111320481 is about 1282.8761174582.

Adding to 2111320481 its reverse (1840231112), we get a palindrome (3951551593).

The spelling of 2111320481 in words is "two billion, one hundred eleven million, three hundred twenty thousand, four hundred eighty-one".