42420402113 has 2 divisors, whose sum is σ = 42420402114. Its totient is φ = 42420402112.

The previous prime is 42420402083. The next prime is 42420402119. The reversal of 42420402113 is 31120402424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34496375824 + 7924026289 = 185732^2 + 89017^2 .

It is a cyclic number.

It is not a de Polignac number, because 42420402113 - 2²⁴ = 42403624897 is a prime.

It is a super-3 number, since 3×42420402113³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 (42420402119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21210201056 + 21210201057.

It is an arithmetic number, because the mean of its divisors is an integer number (21210201057).

Almost surely, 2^42420402113 is an apocalyptic number.

It is an amenable number.

42420402113 is a deficient number, since it is larger than the sum of its proper divisors (1).

42420402113 is an equidigital number, since it uses as much as digits as its factorization.

42420402113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 42420402113 its reverse (31120402424), we get a palindrome (73540804537).

The spelling of 42420402113 in words is "forty-two billion, four hundred twenty million, four hundred two thousand, one hundred thirteen".