124206199985 has 8 divisors (see below), whose sum is σ = 170339931456. Its totient is φ = 85169965680.

The previous prime is 124206199981. The next prime is 124206199987. The reversal of 124206199985 is 589991602421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 124206199985 - 2² = 124206199981 is a prime.

It is a super-2 number, since 2×124206199985² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 124206199985.

It is not an unprimeable number, because it can be changed into a prime (124206199981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1774374251 + ... + 1774374320.

It is an arithmetic number, because the mean of its divisors is an integer number (21292491432).

Almost surely, 2^124206199985 is an apocalyptic number.

It is an amenable number.

124206199985 is a deficient number, since it is larger than the sum of its proper divisors (46133731471).

124206199985 is an equidigital number, since it uses as much as digits as its factorization.

124206199985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3548748583.

The product of its (nonzero) digits is 2799360, while the sum is 56.

Adding to 124206199985 its sum of digits (56), we get a square (124206200041 = 352429²).

The spelling of 124206199985 in words is "one hundred twenty-four billion, two hundred six million, one hundred ninety-nine thousand, nine hundred eighty-five".