4042121051 has 4 divisors (see below), whose sum is σ = 4042395000. Its totient is φ = 4041847104.

The previous prime is 4042121023. The next prime is 4042121087. The reversal of 4042121051 is 1501212404.

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 4042121051 - 2¹⁴ = 4042104667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4042121851) 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, 113501 + ... + 144798.

It is an arithmetic number, because the mean of its divisors is an integer number (1010598750).

Almost surely, 2^4042121051 is an apocalyptic number.

4042121051 is a deficient number, since it is larger than the sum of its proper divisors (273949).

4042121051 is a wasteful number, since it uses less digits than its factorization.

4042121051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273948.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 4042121051 is about 63577.6773010779. The cubic root of 4042121051 is about 1592.9535243944.

Adding to 4042121051 its reverse (1501212404), we get a palindrome (5543333455).

The spelling of 4042121051 in words is "four billion, forty-two million, one hundred twenty-one thousand, fifty-one".