55005121123 has 2 divisors, whose sum is σ = 55005121124. Its totient is φ = 55005121122.

The previous prime is 55005121063. The next prime is 55005121133. The reversal of 55005121123 is 32112150055.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55005121123 is a prime.

It is a super-2 number, since 2×55005121123² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55005121133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27502560561 + 27502560562.

It is an arithmetic number, because the mean of its divisors is an integer number (27502560562).

Almost surely, 2^55005121123 is an apocalyptic number.

55005121123 is a deficient number, since it is larger than the sum of its proper divisors (1).

55005121123 is an equidigital number, since it uses as much as digits as its factorization.

55005121123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1500, while the sum is 25.

Adding to 55005121123 its reverse (32112150055), we get a palindrome (87117271178).

The spelling of 55005121123 in words is "fifty-five billion, five million, one hundred twenty-one thousand, one hundred twenty-three".