1122555100 has 18 divisors (see below), whose sum is σ = 2435944784. Its totient is φ = 449022000.

The previous prime is 1122555073. The next prime is 1122555103. The reversal of 1122555100 is 15552211.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122555103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5612676 + ... + 5612875.

Almost surely, 2^1122555100 is an apocalyptic number.

1122555100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1122555100 is an abundant number, since it is smaller than the sum of its proper divisors (1313389684).

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

1122555100 is a wasteful number, since it uses less digits than its factorization.

1122555100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11225565 (or 11225558 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 1122555100 is about 33504.5534218858. The cubic root of 1122555100 is about 1039.2879433074.

The spelling of 1122555100 in words is "one billion, one hundred twenty-two million, five hundred fifty-five thousand, one hundred".