5553406121 has 2 divisors, whose sum is σ = 5553406122. Its totient is φ = 5553406120.

The previous prime is 5553406057. The next prime is 5553406141. The reversal of 5553406121 is 1216043555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5455890496 + 97515625 = 73864^2 + 9875^2 .

It is a cyclic number.

It is not a de Polignac number, because 5553406121 - 2⁶ = 5553406057 is a prime.

It is not a weakly prime, because it can be changed into another prime (5553406141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2776703060 + 2776703061.

It is an arithmetic number, because the mean of its divisors is an integer number (2776703061).

Almost surely, 2^5553406121 is an apocalyptic number.

It is an amenable number.

5553406121 is a deficient number, since it is larger than the sum of its proper divisors (1).

5553406121 is an equidigital number, since it uses as much as digits as its factorization.

5553406121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 5553406121 is about 74521.1790097285. The cubic root of 5553406121 is about 1770.8691743357.

Adding to 5553406121 its reverse (1216043555), we get a palindrome (6769449676).

The spelling of 5553406121 in words is "five billion, five hundred fifty-three million, four hundred six thousand, one hundred twenty-one".