4661042063221 has 4 divisors (see below), whose sum is σ = 4724891954572. Its totient is φ = 4597192171872.

The previous prime is 4661042063189. The next prime is 4661042063239. The reversal of 4661042063221 is 1223602401664.

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 3184547320900 + 1476494742321 = 1784530^2 + 1215111^2 .

It is a cyclic number.

It is not a de Polignac number, because 4661042063221 - 2⁵ = 4661042063189 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 (4661042063261) 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, 31924945566 + ... + 31924945711.

It is an arithmetic number, because the mean of its divisors is an integer number (1181222988643).

Almost surely, 2^{4661042063221} is an apocalyptic number.

It is an amenable number.

4661042063221 is a deficient number, since it is larger than the sum of its proper divisors (63849891351).

4661042063221 is an equidigital number, since it uses as much as digits as its factorization.

4661042063221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63849891350.

The product of its (nonzero) digits is 82944, while the sum is 37.

Adding to 4661042063221 its reverse (1223602401664), we get a palindrome (5884644464885).

The spelling of 4661042063221 in words is "four trillion, six hundred sixty-one billion, forty-two million, sixty-three thousand, two hundred twenty-one".