55561111122 has 32 divisors (see below), whose sum is σ = 121248969984. Its totient is φ = 16833266000.

The previous prime is 55561111093. The next prime is 55561111139. The reversal of 55561111122 is 22111116555.

It is a super-2 number, since 2×55561111122² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55561111122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250033 + ... + 416699.

It is an arithmetic number, because the mean of its divisors is an integer number (3789030312).

Almost surely, 2^55561111122 is an apocalyptic number.

55561111122 is an abundant number, since it is smaller than the sum of its proper divisors (65687858862).

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

55561111122 is a wasteful number, since it uses less digits than its factorization.

55561111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171734.

The product of its digits is 3000, while the sum is 30.

Adding to 55561111122 its reverse (22111116555), we get a palindrome (77672227677).

The spelling of 55561111122 in words is "fifty-five billion, five hundred sixty-one million, one hundred eleven thousand, one hundred twenty-two".