42121332345 has 16 divisors (see below), whose sum is σ = 68498955072. Its totient is φ = 22096436160.

The previous prime is 42121332317. The next prime is 42121332377. The reversal of 42121332345 is 54323312124.

It is not a de Polignac number, because 42121332345 - 2⁷ = 42121332217 is a prime.

It is an unprimeable number.

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, 23016207 + ... + 23018036.

It is an arithmetic number, because the mean of its divisors is an integer number (4281184692).

Almost surely, 2^42121332345 is an apocalyptic number.

It is an amenable number.

42121332345 is a deficient number, since it is larger than the sum of its proper divisors (26377622727).

42121332345 is a wasteful number, since it uses less digits than its factorization.

42121332345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46034312.

The product of its digits is 17280, while the sum is 30.

Adding to 42121332345 its reverse (54323312124), we get a palindrome (96444644469).

The spelling of 42121332345 in words is "forty-two billion, one hundred twenty-one million, three hundred thirty-two thousand, three hundred forty-five".