21161015460043 has 2 divisors, whose sum is σ = 21161015460044. Its totient is φ = 21161015460042.

The previous prime is 21161015460031. The next prime is 21161015460059. The reversal of 21161015460043 is 34006451016112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21161015460043 - 2³⁷ = 21023576506571 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21161015459990 and 21161015460008.

It is not a weakly prime, because it can be changed into another prime (21161015460073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10580507730021 + 10580507730022.

It is an arithmetic number, because the mean of its divisors is an integer number (10580507730022).

Almost surely, 2^{21161015460043} is an apocalyptic number.

21161015460043 is a deficient number, since it is larger than the sum of its proper divisors (1).

21161015460043 is an equidigital number, since it uses as much as digits as its factorization.

21161015460043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

Adding to 21161015460043 its reverse (34006451016112), we get a palindrome (55167466476155).

The spelling of 21161015460043 in words is "twenty-one trillion, one hundred sixty-one billion, fifteen million, four hundred sixty thousand, forty-three".