123100001200 has 60 divisors (see below), whose sum is σ = 322633923768. Its totient is φ = 44763635200.

The previous prime is 123100001179. The next prime is 123100001203. The reversal of 123100001200 is 2100001321.

It is a super-2 number, since 2×123100001200² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (123100001203) 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 11 ways as a sum of consecutive naturals, for example, 13984237 + ... + 13993036.

Almost surely, 2^123100001200 is an apocalyptic number.

123100001200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123100001200 is an abundant number, since it is smaller than the sum of its proper divisors (199533922568).

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

123100001200 is a wasteful number, since it uses less digits than its factorization.

123100001200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27977302 (or 27977291 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 123100001200 its reverse (2100001321), we get a palindrome (125200002521).

The spelling of 123100001200 in words is "one hundred twenty-three billion, one hundred million, one thousand, two hundred".