55105245121 has 4 divisors (see below), whose sum is σ = 58005521200. Its totient is φ = 52204969044.

The previous prime is 55105245101. The next prime is 55105245133. The reversal of 55105245121 is 12154250155.

55105245121 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55105245121 - 2¹⁹ = 55104720833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55105245101) 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, 1450138011 + ... + 1450138048.

It is an arithmetic number, because the mean of its divisors is an integer number (14501380300).

Almost surely, 2^55105245121 is an apocalyptic number.

It is an amenable number.

55105245121 is a deficient number, since it is larger than the sum of its proper divisors (2900276079).

55105245121 is a wasteful number, since it uses less digits than its factorization.

55105245121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2900276078.

The product of its (nonzero) digits is 10000, while the sum is 31.

Adding to 55105245121 its reverse (12154250155), we get a palindrome (67259495276).

The spelling of 55105245121 in words is "fifty-five billion, one hundred five million, two hundred forty-five thousand, one hundred twenty-one".