21110464043 has 2 divisors, whose sum is σ = 21110464044. Its totient is φ = 21110464042.

The previous prime is 21110464031. The next prime is 21110464061. The reversal of 21110464043 is 34046401112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21110464043 - 2⁴ = 21110464027 is a prime.

It is a super-2 number, since 2×21110464043² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21110464013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555232021 + 10555232022.

It is an arithmetic number, because the mean of its divisors is an integer number (10555232022).

Almost surely, 2^21110464043 is an apocalyptic number.

21110464043 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110464043 is an equidigital number, since it uses as much as digits as its factorization.

21110464043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 21110464043 its reverse (34046401112), we get a palindrome (55156865155).

The spelling of 21110464043 in words is "twenty-one billion, one hundred ten million, four hundred sixty-four thousand, forty-three".