4210420044121 has 4 divisors (see below), whose sum is σ = 4232235692212. Its totient is φ = 4188604396032.

The previous prime is 4210420044053. The next prime is 4210420044139. The reversal of 4210420044121 is 1214400240124.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1844326963600 + 2366093080521 = 1358060^2 + 1538211^2 .

It is a cyclic number.

It is not a de Polignac number, because 4210420044121 - 2³⁹ = 3660664230233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4210420044821) 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, 10907823756 + ... + 10907824141.

It is an arithmetic number, because the mean of its divisors is an integer number (1058058923053).

Almost surely, 2^{4210420044121} is an apocalyptic number.

It is an amenable number.

4210420044121 is a deficient number, since it is larger than the sum of its proper divisors (21815648091).

4210420044121 is a wasteful number, since it uses less digits than its factorization.

4210420044121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21815648090.

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

Adding to 4210420044121 its reverse (1214400240124), we get a palindrome (5424820284245).

The spelling of 4210420044121 in words is "four trillion, two hundred ten billion, four hundred twenty million, forty-four thousand, one hundred twenty-one".