55122120101 has 4 divisors (see below), whose sum is σ = 58364597772. Its totient is φ = 51879642432.

The previous prime is 55122120089. The next prime is 55122120181. The reversal of 55122120101 is 10102122155.

55122120101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 23295916900 + 31826203201 = 152630^2 + 178399^2 .

It is a cyclic number.

It is not a de Polignac number, because 55122120101 - 2⁶ = 55122120037 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 (55122120181) 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, 1621238810 + ... + 1621238843.

It is an arithmetic number, because the mean of its divisors is an integer number (14591149443).

Almost surely, 2^55122120101 is an apocalyptic number.

It is an amenable number.

55122120101 is a deficient number, since it is larger than the sum of its proper divisors (3242477671).

55122120101 is a wasteful number, since it uses less digits than its factorization.

55122120101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3242477670.

The product of its (nonzero) digits is 200, while the sum is 20.

Adding to 55122120101 its reverse (10102122155), we get a palindrome (65224242256).

The spelling of 55122120101 in words is "fifty-five billion, one hundred twenty-two million, one hundred twenty thousand, one hundred one".