55213441121 has 2 divisors, whose sum is σ = 55213441122. Its totient is φ = 55213441120.

The previous prime is 55213441117. The next prime is 55213441123. The reversal of 55213441121 is 12114431255.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53991169600 + 1222271521 = 232360^2 + 34961^2 .

It is a cyclic number.

It is not a de Polignac number, because 55213441121 - 2² = 55213441117 is a prime.

Together with 55213441123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55213441123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27606720560 + 27606720561.

It is an arithmetic number, because the mean of its divisors is an integer number (27606720561).

Almost surely, 2^55213441121 is an apocalyptic number.

It is an amenable number.

55213441121 is a deficient number, since it is larger than the sum of its proper divisors (1).

55213441121 is an equidigital number, since it uses as much as digits as its factorization.

55213441121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4800, while the sum is 29.

Adding to 55213441121 its reverse (12114431255), we get a palindrome (67327872376).

The spelling of 55213441121 in words is "fifty-five billion, two hundred thirteen million, four hundred forty-one thousand, one hundred twenty-one".