200123126511 has 48 divisors (see below), whose sum is σ = 338687163648. Its totient is φ = 103937232000.

The previous prime is 200123126509. The next prime is 200123126519. The reversal of 200123126511 is 115621321002.

It is a happy number.

200123126511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 200123126511 - 2¹ = 200123126509 is a prime.

It is a super-2 number, since 2×200123126511² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200123126519) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 9340411 + ... + 9361811.

It is an arithmetic number, because the mean of its divisors is an integer number (7055982576).

Almost surely, 2^200123126511 is an apocalyptic number.

200123126511 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

200123126511 is a deficient number, since it is larger than the sum of its proper divisors (138564037137).

200123126511 is a wasteful number, since it uses less digits than its factorization.

200123126511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27212 (or 27205 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 200123126511 its reverse (115621321002), we get a palindrome (315744447513).

The spelling of 200123126511 in words is "two hundred billion, one hundred twenty-three million, one hundred twenty-six thousand, five hundred eleven".