55335223121 has 4 divisors (see below), whose sum is σ = 55341401700. Its totient is φ = 55329044544.

The previous prime is 55335223063. The next prime is 55335223171. The reversal of 55335223121 is 12132253355.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12132253355 = 5 ⋅2426450671.

It can be written as a sum of positive squares in 2 ways, for example, as 22189379521 + 33145843600 = 148961^2 + 182060^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55335223121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55335223171) 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, 3075836 + ... + 3093773.

It is an arithmetic number, because the mean of its divisors is an integer number (13835350425).

Almost surely, 2^55335223121 is an apocalyptic number.

It is an amenable number.

55335223121 is a deficient number, since it is larger than the sum of its proper divisors (6178579).

55335223121 is an equidigital number, since it uses as much as digits as its factorization.

55335223121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6178578.

The product of its digits is 27000, while the sum is 32.

Adding to 55335223121 its reverse (12132253355), we get a palindrome (67467476476).

The spelling of 55335223121 in words is "fifty-five billion, three hundred thirty-five million, two hundred twenty-three thousand, one hundred twenty-one".