42423302121 has 16 divisors (see below), whose sum is σ = 59077809600. Its totient is φ = 27051409728.

The previous prime is 42423302107. The next prime is 42423302143. The reversal of 42423302121 is 12120332424.

It is a happy number.

It is not a de Polignac number, because 42423302121 - 2¹⁰ = 42423301097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42423302091 and 42423302100.

It is not an unprimeable number, because it can be changed into a prime (42423302101) 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 in 15 ways as a sum of consecutive naturals, for example, 3232366 + ... + 3245463.

It is an arithmetic number, because the mean of its divisors is an integer number (3692363100).

Almost surely, 2^42423302121 is an apocalyptic number.

It is an amenable number.

42423302121 is a deficient number, since it is larger than the sum of its proper divisors (16654507479).

42423302121 is a wasteful number, since it uses less digits than its factorization.

42423302121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6477928.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 42423302121 its reverse (12120332424), we get a palindrome (54543634545).

The spelling of 42423302121 in words is "forty-two billion, four hundred twenty-three million, three hundred two thousand, one hundred twenty-one".