123100002 has 48 divisors (see below), whose sum is σ = 279377280. Its totient is φ = 39099456.

The previous prime is 123099997. The next prime is 123100051. The reversal of 123100002 is 200001321.

It is a happy number.

It is a super-2 number, since 2×123100002² = 30307220984800008, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 168963 + ... + 169689.

It is an arithmetic number, because the mean of its divisors is an integer number (5820360).

Almost surely, 2^123100002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123100002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139688640).

123100002 is an abundant number, since it is smaller than the sum of its proper divisors (156277278).

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

123100002 is a wasteful number, since it uses less digits than its factorization.

123100002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167 (or 1164 counting only the distinct ones).

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

The square root of 123100002 is about 11095.0440287545. The cubic root of 123100002 is about 497.4537243053.

Adding to 123100002 its reverse (200001321), we get a palindrome (323101323).

The spelling of 123100002 in words is "one hundred twenty-three million, one hundred thousand, two".