5456421221 has 2 divisors, whose sum is σ = 5456421222. Its totient is φ = 5456421220.

The previous prime is 5456421209. The next prime is 5456421233. The reversal of 5456421221 is 1221246545.

It is a balanced prime because it is at equal distance from previous prime (5456421209) and next prime (5456421233).

It can be written as a sum of positive squares in only one way, i.e., 3085802500 + 2370618721 = 55550^2 + 48689^2 .

It is a cyclic number.

It is not a de Polignac number, because 5456421221 - 2³⁰ = 4382679397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5456421821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2728210610 + 2728210611.

It is an arithmetic number, because the mean of its divisors is an integer number (2728210611).

Almost surely, 2^5456421221 is an apocalyptic number.

It is an amenable number.

5456421221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5456421221 is an equidigital number, since it uses as much as digits as its factorization.

5456421221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19200, while the sum is 32.

The square root of 5456421221 is about 73867.5924949500. The cubic root of 5456421221 is about 1760.4997312214.

Adding to 5456421221 its reverse (1221246545), we get a palindrome (6677667766).

The spelling of 5456421221 in words is "five billion, four hundred fifty-six million, four hundred twenty-one thousand, two hundred twenty-one".