100124455561 has 8 divisors (see below), whose sum is σ = 107832226824. Its totient is φ = 92417525760.

The previous prime is 100124455559. The next prime is 100124455601. The reversal of 100124455561 is 165554421001.

It can be written as a sum of positive squares in 4 ways, for example, as 66113161 + 100058342400 = 8131^2 + 316320^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 100124455561 - 2¹ = 100124455559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100124465561) 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, 48585 + ... + 450121.

It is an arithmetic number, because the mean of its divisors is an integer number (13479028353).

Almost surely, 2^100124455561 is an apocalyptic number.

It is an amenable number.

100124455561 is a deficient number, since it is larger than the sum of its proper divisors (7707771263).

100124455561 is a wasteful number, since it uses less digits than its factorization.

100124455561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420731.

The product of its (nonzero) digits is 24000, while the sum is 34.

Adding to 100124455561 its reverse (165554421001), we get a palindrome (265678876562).

The spelling of 100124455561 in words is "one hundred billion, one hundred twenty-four million, four hundred fifty-five thousand, five hundred sixty-one".