55140124121 has 16 divisors (see below), whose sum is σ = 59431553280. Its totient is φ = 50967732480.

The previous prime is 55140124097. The next prime is 55140124159. The reversal of 55140124121 is 12142104155.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 55140124121 - 2¹⁰ = 55140123097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55140124021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 643040 + ... + 723726.

It is an arithmetic number, because the mean of its divisors is an integer number (3714472080).

Almost surely, 2^55140124121 is an apocalyptic number.

It is an amenable number.

55140124121 is a deficient number, since it is larger than the sum of its proper divisors (4291429159).

55140124121 is a wasteful number, since it uses less digits than its factorization.

55140124121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81424.

The product of its (nonzero) digits is 1600, while the sum is 26.

Adding to 55140124121 its reverse (12142104155), we get a palindrome (67282228276).

The spelling of 55140124121 in words is "fifty-five billion, one hundred forty million, one hundred twenty-four thousand, one hundred twenty-one".