54868138121 has 2 divisors, whose sum is σ = 54868138122. Its totient is φ = 54868138120.

The previous prime is 54868138081. The next prime is 54868138123. The reversal of 54868138121 is 12183186845.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30513102400 + 24355035721 = 174680^2 + 156061^2 .

It is a cyclic number.

It is not a de Polignac number, because 54868138121 - 2⁶ = 54868138057 is a prime.

Together with 54868138123, 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 (54868138123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27434069060 + 27434069061.

It is an arithmetic number, because the mean of its divisors is an integer number (27434069061).

Almost surely, 2^54868138121 is an apocalyptic number.

It is an amenable number.

54868138121 is a deficient number, since it is larger than the sum of its proper divisors (1).

54868138121 is an equidigital number, since it uses as much as digits as its factorization.

54868138121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 368640, while the sum is 47.

The spelling of 54868138121 in words is "fifty-four billion, eight hundred sixty-eight million, one hundred thirty-eight thousand, one hundred twenty-one".