4355020424221 has 4 divisors (see below), whose sum is σ = 4611198096252. Its totient is φ = 4098842752192.

The previous prime is 4355020424179. The next prime is 4355020424243. The reversal of 4355020424221 is 1224240205534.

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 3791545001721 + 563475422500 = 1947189^2 + 750650^2 .

It is a cyclic number.

It is not a de Polignac number, because 4355020424221 - 2¹⁵ = 4355020391453 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 (4355020424281) 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, 128088835990 + ... + 128088836023.

It is an arithmetic number, because the mean of its divisors is an integer number (1152799524063).

Almost surely, 2^{4355020424221} is an apocalyptic number.

It is an amenable number.

4355020424221 is a deficient number, since it is larger than the sum of its proper divisors (256177672031).

4355020424221 is a wasteful number, since it uses less digits than its factorization.

4355020424221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256177672030.

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 4355020424221 its reverse (1224240205534), we get a palindrome (5579260629755).

The spelling of 4355020424221 in words is "four trillion, three hundred fifty-five billion, twenty million, four hundred twenty-four thousand, two hundred twenty-one".