21230001113 has 2 divisors, whose sum is σ = 21230001114. Its totient is φ = 21230001112.

The previous prime is 21230001103. The next prime is 21230001137. The reversal of 21230001113 is 31110003212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11775939289 + 9454061824 = 108517^2 + 97232^2 .

It is a cyclic number.

It is not a de Polignac number, because 21230001113 - 2⁶ = 21230001049 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (21230001103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615000556 + 10615000557.

It is an arithmetic number, because the mean of its divisors is an integer number (10615000557).

Almost surely, 2^21230001113 is an apocalyptic number.

It is an amenable number.

21230001113 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230001113 is an equidigital number, since it uses as much as digits as its factorization.

21230001113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21230001113 its reverse (31110003212), we get a palindrome (52340004325).

The spelling of 21230001113 in words is "twenty-one billion, two hundred thirty million, one thousand, one hundred thirteen".