5541211221 has 64 divisors (see below), whose sum is σ = 9816145920. Its totient is φ = 2699262720.

The previous prime is 5541211187. The next prime is 5541211237. The reversal of 5541211221 is 1221121455.

It is a happy number.

It is not a de Polignac number, because 5541211221 - 2⁹ = 5541210709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5541211191 and 5541211200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5541211021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 166876 + ... + 197306.

It is an arithmetic number, because the mean of its divisors is an integer number (153377280).

Almost surely, 2^5541211221 is an apocalyptic number.

It is an amenable number.

5541211221 is a deficient number, since it is larger than the sum of its proper divisors (4274934699).

5541211221 is a wasteful number, since it uses less digits than its factorization.

5541211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30506.

The product of its digits is 800, while the sum is 24.

The square root of 5541211221 is about 74439.3123356201. The cubic root of 5541211221 is about 1769.5719885004.

Adding to 5541211221 its reverse (1221121455), we get a palindrome (6762332676).

The spelling of 5541211221 in words is "five billion, five hundred forty-one million, two hundred eleven thousand, two hundred twenty-one".