100601553123 has 28 divisors (see below), whose sum is σ = 159705898488. Its totient is φ = 63122535360.

The previous prime is 100601553109. The next prime is 100601553127. The reversal of 100601553123 is 321355106001.

100601553123 is a `hidden beast` number, since 1 + 0 + 0 + 601 + 5 + 5 + 31 + 23 = 666.

It is not a de Polignac number, because 100601553123 - 2²² = 100597358819 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (100601553127) 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 27 ways as a sum of consecutive naturals, for example, 4046413 + ... + 4071198.

Almost surely, 2^100601553123 is an apocalyptic number.

100601553123 is a deficient number, since it is larger than the sum of its proper divisors (59104345365).

100601553123 is an frugal number, since it uses more digits than its factorization.

100601553123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8117646 (or 8117631 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

Adding to 100601553123 its reverse (321355106001), we get a palindrome (421956659124).

The spelling of 100601553123 in words is "one hundred billion, six hundred one million, five hundred fifty-three thousand, one hundred twenty-three".