42412302181 has 2 divisors, whose sum is σ = 42412302182. Its totient is φ = 42412302180.

The previous prime is 42412302157. The next prime is 42412302263. The reversal of 42412302181 is 18120321424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27560980225 + 14851321956 = 166015^2 + 121866^2 .

It is a cyclic number.

It is not a de Polignac number, because 42412302181 - 2²¹ = 42410205029 is a prime.

It is a super-2 number, since 2×42412302181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42412002181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21206151090 + 21206151091.

It is an arithmetic number, because the mean of its divisors is an integer number (21206151091).

Almost surely, 2^42412302181 is an apocalyptic number.

It is an amenable number.

42412302181 is a deficient number, since it is larger than the sum of its proper divisors (1).

42412302181 is an equidigital number, since it uses as much as digits as its factorization.

42412302181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 28.

The spelling of 42412302181 in words is "forty-two billion, four hundred twelve million, three hundred two thousand, one hundred eighty-one".