4244142121 has 4 divisors (see below), whose sum is σ = 4246765200. Its totient is φ = 4241519044.

The previous prime is 4244142107. The next prime is 4244142127. The reversal of 4244142121 is 1212414424.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4244142121 - 2¹⁷ = 4244011049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4244142127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1309111 + ... + 1312348.

It is an arithmetic number, because the mean of its divisors is an integer number (1061691300).

Almost surely, 2^4244142121 is an apocalyptic number.

It is an amenable number.

4244142121 is a deficient number, since it is larger than the sum of its proper divisors (2623079).

4244142121 is a wasteful number, since it uses less digits than its factorization.

4244142121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2623078.

The product of its digits is 2048, while the sum is 25.

The square root of 4244142121 is about 65147.0806790297. The cubic root of 4244142121 is about 1619.0613524207.

Adding to 4244142121 its reverse (1212414424), we get a palindrome (5456556545).

The spelling of 4244142121 in words is "four billion, two hundred forty-four million, one hundred forty-two thousand, one hundred twenty-one".