123200000001 has 32 divisors (see below), whose sum is σ = 197993214720. Its totient is φ = 75261958272.

The previous prime is 123199999943. The next prime is 123200000003. The reversal of 123200000001 is 100000002321.

It is a happy number.

It is not a de Polignac number, because 123200000001 - 2⁷ = 123199999873 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 (123200000003) 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, 1232925 + ... + 1329098.

It is an arithmetic number, because the mean of its divisors is an integer number (6187287960).

Almost surely, 2^123200000001 is an apocalyptic number.

It is an amenable number.

123200000001 is a deficient number, since it is larger than the sum of its proper divisors (74793214719).

123200000001 is a wasteful number, since it uses less digits than its factorization.

123200000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562182 (or 2562176 counting only the distinct ones).

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

Adding to 123200000001 its reverse (100000002321), we get a palindrome (223200002322).

The spelling of 123200000001 in words is "one hundred twenty-three billion, two hundred million, one", and thus it is an aban number.