5441121221 has 4 divisors (see below), whose sum is σ = 5441585292. Its totient is φ = 5440657152.

The previous prime is 5441121197. The next prime is 5441121227. The reversal of 5441121221 is 1221211445.

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 784560100 + 4656561121 = 28010^2 + 68239^2 .

It is a cyclic number.

It is not a de Polignac number, because 5441121221 - 2²² = 5436926917 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 (5441121227) 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, 213980 + ... + 238053.

It is an arithmetic number, because the mean of its divisors is an integer number (1360396323).

Almost surely, 2^5441121221 is an apocalyptic number.

It is an amenable number.

5441121221 is a deficient number, since it is larger than the sum of its proper divisors (464071).

5441121221 is a wasteful number, since it uses less digits than its factorization.

5441121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464070.

The product of its digits is 640, while the sum is 23.

The square root of 5441121221 is about 73763.9561100135. The cubic root of 5441121221 is about 1758.8526894297.

Adding to 5441121221 its reverse (1221211445), we get a palindrome (6662332666).

The spelling of 5441121221 in words is "five billion, four hundred forty-one million, one hundred twenty-one thousand, two hundred twenty-one".