55122561212 has 12 divisors (see below), whose sum is σ = 97078906680. Its totient is φ = 27385730736.

The previous prime is 55122561209. The next prime is 55122561223. The reversal of 55122561212 is 21216522155.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 43886762 + ... + 43888017.

It is an arithmetic number, because the mean of its divisors is an integer number (8089908890).

Almost surely, 2^55122561212 is an apocalyptic number.

It is an amenable number.

55122561212 is a deficient number, since it is larger than the sum of its proper divisors (41956345468).

55122561212 is a wasteful number, since it uses less digits than its factorization.

55122561212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87774940 (or 87774938 counting only the distinct ones).

The product of its digits is 12000, while the sum is 32.

The spelling of 55122561212 in words is "fifty-five billion, one hundred twenty-two million, five hundred sixty-one thousand, two hundred twelve".