42850000121 has 2 divisors, whose sum is σ = 42850000122. Its totient is φ = 42850000120.

The previous prime is 42850000099. The next prime is 42850000129. The reversal of 42850000121 is 12100005824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34657034896 + 8192965225 = 186164^2 + 90515^2 .

It is a cyclic number.

It is not a de Polignac number, because 42850000121 - 2²² = 42845805817 is a prime.

It is a super-2 number, since 2×42850000121² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42850000129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21425000060 + 21425000061.

It is an arithmetic number, because the mean of its divisors is an integer number (21425000061).

Almost surely, 2^42850000121 is an apocalyptic number.

It is an amenable number.

42850000121 is a deficient number, since it is larger than the sum of its proper divisors (1).

42850000121 is an equidigital number, since it uses as much as digits as its factorization.

42850000121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 42850000121 its reverse (12100005824), we get a palindrome (54950005945).

The spelling of 42850000121 in words is "forty-two billion, eight hundred fifty million, one hundred twenty-one", and thus it is an aban number.