55120533121 has 4 divisors (see below), whose sum is σ = 55655684032. Its totient is φ = 54585382212.

The previous prime is 55120533119. The next prime is 55120533133. The reversal of 55120533121 is 12133502155.

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 55120533121 - 2¹ = 55120533119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55120533121.

It is not an unprimeable number, because it can be changed into a prime (55120533101) 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, 267575301 + ... + 267575506.

It is an arithmetic number, because the mean of its divisors is an integer number (13913921008).

Almost surely, 2^55120533121 is an apocalyptic number.

It is an amenable number.

55120533121 is a deficient number, since it is larger than the sum of its proper divisors (535150911).

55120533121 is a wasteful number, since it uses less digits than its factorization.

55120533121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535150910.

The product of its (nonzero) digits is 4500, while the sum is 28.

The spelling of 55120533121 in words is "fifty-five billion, one hundred twenty million, five hundred thirty-three thousand, one hundred twenty-one".