4242121111 has 4 divisors (see below), whose sum is σ = 4242308112. Its totient is φ = 4241934112.

The previous prime is 4242121069. The next prime is 4242121133. The reversal of 4242121111 is 1111212424.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4242121111 - 2⁷ = 4242120983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4242121511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53875 + ... + 106708.

It is an arithmetic number, because the mean of its divisors is an integer number (1060577028).

Almost surely, 2^4242121111 is an apocalyptic number.

4242121111 is a deficient number, since it is larger than the sum of its proper divisors (187001).

4242121111 is a wasteful number, since it uses less digits than its factorization.

4242121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187000.

The product of its digits is 128, while the sum is 19.

The square root of 4242121111 is about 65131.5676995418. The cubic root of 4242121111 is about 1618.8043190311.

Adding to 4242121111 its reverse (1111212424), we get a palindrome (5353333535).

The spelling of 4242121111 in words is "four billion, two hundred forty-two million, one hundred twenty-one thousand, one hundred eleven".