1000200123 has 32 divisors (see below), whose sum is σ = 1599689280. Its totient is φ = 613992960.

The previous prime is 1000200107. The next prime is 1000200127. The reversal of 1000200123 is 3210020001.

It is a happy number.

It is not a de Polignac number, because 1000200123 - 2⁴ = 1000200107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1000200127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148693 + ... + 155273.

It is an arithmetic number, because the mean of its divisors is an integer number (49990290).

Almost surely, 2^1000200123 is an apocalyptic number.

1000200123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1000200123 is a deficient number, since it is larger than the sum of its proper divisors (599489157).

1000200123 is a wasteful number, since it uses less digits than its factorization.

1000200123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7036 (or 7030 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1000200123 is about 31625.9406658521. The cubic root of 1000200123 is about 1000.0667032172.

Adding to 1000200123 its reverse (3210020001), we get a palindrome (4210220124).

The spelling of 1000200123 in words is "one billion, two hundred thousand, one hundred twenty-three".