123196223985 has 64 divisors (see below), whose sum is σ = 213340345344. Its totient is φ = 60469760000.

The previous prime is 123196223981. The next prime is 123196223989. The reversal of 123196223985 is 589322691321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (123196223981) and next prime (123196223989).

It is not a de Polignac number, because 123196223985 - 2² = 123196223981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123196223981) 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 63 ways as a sum of consecutive naturals, for example, 15588535 + ... + 15596435.

It is an arithmetic number, because the mean of its divisors is an integer number (3333442896).

Almost surely, 2^123196223985 is an apocalyptic number.

123196223985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123196223985 is a deficient number, since it is larger than the sum of its proper divisors (90144121359).

123196223985 is a wasteful number, since it uses less digits than its factorization.

123196223985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9274.

The product of its digits is 1399680, while the sum is 51.

The spelling of 123196223985 in words is "one hundred twenty-three billion, one hundred ninety-six million, two hundred twenty-three thousand, nine hundred eighty-five".