55123112020 has 12 divisors (see below), whose sum is σ = 115758535284. Its totient is φ = 22049244800.

The previous prime is 55123112003. The next prime is 55123112021. The reversal of 55123112020 is 2021132155.

It can be written as a sum of positive squares in 2 ways, for example, as 26591172624 + 28531939396 = 163068^2 + 168914^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55123111982 and 55123112000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55123112021) 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 in 3 ways as a sum of consecutive naturals, for example, 1378077781 + ... + 1378077820.

It is an arithmetic number, because the mean of its divisors is an integer number (9646544607).

Almost surely, 2^55123112020 is an apocalyptic number.

It is an amenable number.

55123112020 is an abundant number, since it is smaller than the sum of its proper divisors (60635423264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55123112020 is a wasteful number, since it uses less digits than its factorization.

55123112020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2756155610 (or 2756155608 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 55123112020 its reverse (2021132155), we get a palindrome (57144244175).

The spelling of 55123112020 in words is "fifty-five billion, one hundred twenty-three million, one hundred twelve thousand, twenty".