1223559028100 has 36 divisors (see below), whose sum is σ = 2655229887744. Its totient is φ = 489403925280.

The previous prime is 1223559028093. The next prime is 1223559028157. The reversal of 1223559028100 is 18209553221.

It is a super-2 number, since 2×1223559028100² (a number of 25 digits) contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 2393357 + ... + 2859243.

Almost surely, 2^{1223559028100} is an apocalyptic number.

1223559028100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223559028100 is an abundant number, since it is smaller than the sum of its proper divisors (1431670859644).

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

1223559028100 is a wasteful number, since it uses less digits than its factorization.

1223559028100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492164 (or 492157 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 1223559028100 in words is "one trillion, two hundred twenty-three billion, five hundred fifty-nine million, twenty-eight thousand, one hundred".