420200200123 has 4 divisors (see below), whose sum is σ = 458400218328. Its totient is φ = 382000181920.

The previous prime is 420200200109. The next prime is 420200200151. The reversal of 420200200123 is 321002002024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420200200123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420200200097 and 420200200106.

It is not an unprimeable number, because it can be changed into a prime (420200200223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19100009086 + ... + 19100009107.

It is an arithmetic number, because the mean of its divisors is an integer number (114600054582).

Almost surely, 2^420200200123 is an apocalyptic number.

420200200123 is a deficient number, since it is larger than the sum of its proper divisors (38200018205).

420200200123 is a wasteful number, since it uses less digits than its factorization.

420200200123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38200018204.

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 420200200123 its reverse (321002002024), we get a palindrome (741202202147).

It can be divided in two parts, 4202002001 and 23, that added together give a palindrome (4202002024).

The spelling of 420200200123 in words is "four hundred twenty billion, two hundred million, two hundred thousand, one hundred twenty-three".