42420021011 has 2 divisors, whose sum is σ = 42420021012. Its totient is φ = 42420021010.

The previous prime is 42420020999. The next prime is 42420021023. The reversal of 42420021011 is 11012002424.

It is a balanced prime because it is at equal distance from previous prime (42420020999) and next prime (42420021023).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42420021011 is a prime.

It is not a weakly prime, because it can be changed into another prime (42420021811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21210010505 + 21210010506.

It is an arithmetic number, because the mean of its divisors is an integer number (21210010506).

Almost surely, 2^42420021011 is an apocalyptic number.

42420021011 is a deficient number, since it is larger than the sum of its proper divisors (1).

42420021011 is an equidigital number, since it uses as much as digits as its factorization.

42420021011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 42420021011 its reverse (11012002424), we get a palindrome (53432023435).

The spelling of 42420021011 in words is "forty-two billion, four hundred twenty million, twenty-one thousand, eleven".