42102300209 has 2 divisors, whose sum is σ = 42102300210. Its totient is φ = 42102300208.

The previous prime is 42102300179. The next prime is 42102300269. The reversal of 42102300209 is 90200320124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22022560000 + 20079740209 = 148400^2 + 141703^2 .

It is a cyclic number.

It is not a de Polignac number, because 42102300209 - 2²⁴ = 42085522993 is a prime.

It is a super-2 number, since 2×42102300209² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42102300269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21051150104 + 21051150105.

It is an arithmetic number, because the mean of its divisors is an integer number (21051150105).

Almost surely, 2^42102300209 is an apocalyptic number.

It is an amenable number.

42102300209 is a deficient number, since it is larger than the sum of its proper divisors (1).

42102300209 is an equidigital number, since it uses as much as digits as its factorization.

42102300209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The spelling of 42102300209 in words is "forty-two billion, one hundred two million, three hundred thousand, two hundred nine".