4242121505 has 16 divisors (see below), whose sum is σ = 5112374400. Its totient is φ = 3379178880.

The previous prime is 4242121501. The next prime is 4242121511. The reversal of 4242121505 is 5051212424.

It is not a de Polignac number, because 4242121505 - 2² = 4242121501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4242121501) 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, 1320341 + ... + 1323549.

It is an arithmetic number, because the mean of its divisors is an integer number (319523400).

Almost surely, 2^4242121505 is an apocalyptic number.

It is an amenable number.

4242121505 is a deficient number, since it is larger than the sum of its proper divisors (870252895).

4242121505 is a wasteful number, since it uses less digits than its factorization.

4242121505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4264.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 4242121505 is about 65131.5707241887. The cubic root of 4242121505 is about 1618.8043691483.

Adding to 4242121505 its reverse (5051212424), we get a palindrome (9293333929).

The spelling of 4242121505 in words is "four billion, two hundred forty-two million, one hundred twenty-one thousand, five hundred five".