201123465556 has 12 divisors (see below), whose sum is σ = 379040377492. Its totient is φ = 92826214848.

The previous prime is 201123465503. The next prime is 201123465607. The reversal of 201123465556 is 655564321102.

201123465556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 22042153156 + 179081312400 = 148466^2 + 423180^2 .

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, 1933879425 + ... + 1933879528.

Almost surely, 2^201123465556 is an apocalyptic number.

201123465556 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

201123465556 is a deficient number, since it is larger than the sum of its proper divisors (177916911936).

201123465556 is a wasteful number, since it uses less digits than its factorization.

201123465556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3867758970 (or 3867758968 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 40.

Adding to 201123465556 its reverse (655564321102), we get a palindrome (856687786658).

The spelling of 201123465556 in words is "two hundred one billion, one hundred twenty-three million, four hundred sixty-five thousand, five hundred fifty-six".