4024121535421 has 4 divisors (see below), whose sum is σ = 4333669345852. Its totient is φ = 3714573724992.

The previous prime is 4024121535409. The next prime is 4024121535481. The reversal of 4024121535421 is 1245351214204.

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 1004906002500 + 3019215532921 = 1002450^2 + 1737589^2 .

It is not a de Polignac number, because 4024121535421 - 2¹¹ = 4024121533373 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 (4024121535481) 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, 154773905196 + ... + 154773905221.

It is an arithmetic number, because the mean of its divisors is an integer number (1083417336463).

Almost surely, 2^{4024121535421} is an apocalyptic number.

It is an amenable number.

4024121535421 is a deficient number, since it is larger than the sum of its proper divisors (309547810431).

4024121535421 is a wasteful number, since it uses less digits than its factorization.

4024121535421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309547810430.

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 4024121535421 its reverse (1245351214204), we get a palindrome (5269472749625).

The spelling of 4024121535421 in words is "four trillion, twenty-four billion, one hundred twenty-one million, five hundred thirty-five thousand, four hundred twenty-one".