541221366420 has 144 divisors (see below), whose sum is σ = 1876463971200. Its totient is φ = 123692583168.

The previous prime is 541221366401. The next prime is 541221366421. The reversal of 541221366420 is 24663122145.

541221366420 is a `hidden beast` number, since 5 + 4 + 1 + 2 + 2 + 1 + 3 + 6 + 642 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (541221366421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12703474 + ... + 12746006.

It is an arithmetic number, because the mean of its divisors is an integer number (13030999800).

Almost surely, 2^541221366420 is an apocalyptic number.

It is an amenable number.

541221366420 is an abundant number, since it is smaller than the sum of its proper divisors (1335242604780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

541221366420 is a wasteful number, since it uses less digits than its factorization.

541221366420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52654 (or 52649 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 541221366420 its reverse (24663122145), we get a palindrome (565884488565).

The spelling of 541221366420 in words is "five hundred forty-one billion, two hundred twenty-one million, three hundred sixty-six thousand, four hundred twenty".