21110030369 has 2 divisors, whose sum is σ = 21110030370. Its totient is φ = 21110030368.

The previous prime is 21110030317. The next prime is 21110030429. The reversal of 21110030369 is 96303001112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21106278400 + 3751969 = 145280^2 + 1937^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110030369 - 2⁸ = 21110030113 is a prime.

It is a super-2 number, since 2×21110030369² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21110030309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555015184 + 10555015185.

It is an arithmetic number, because the mean of its divisors is an integer number (10555015185).

Almost surely, 2^21110030369 is an apocalyptic number.

It is an amenable number.

21110030369 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110030369 is an equidigital number, since it uses as much as digits as its factorization.

21110030369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 26.

The spelling of 21110030369 in words is "twenty-one billion, one hundred ten million, thirty thousand, three hundred sixty-nine".