541054561221 has 20 divisors (see below), whose sum is σ = 808355234412. Its totient is φ = 360652506048.

The previous prime is 541054561219. The next prime is 541054561241. The reversal of 541054561221 is 122165450145.

541054561221 is a `hidden beast` number, since 5 + 4 + 10 + 5 + 4 + 5 + 612 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 127367616996 + 413686944225 = 356886^2 + 643185^2 .

It is not a de Polignac number, because 541054561221 - 2¹ = 541054561219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (541054561241) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 118315 + ... + 1046951.

Almost surely, 2^541054561221 is an apocalyptic number.

It is an amenable number.

541054561221 is a deficient number, since it is larger than the sum of its proper divisors (267300673191).

541054561221 is an equidigital number, since it uses as much as digits as its factorization.

541054561221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935842 (or 935833 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The spelling of 541054561221 in words is "five hundred forty-one billion, fifty-four million, five hundred sixty-one thousand, two hundred twenty-one".