100123122031 has 4 divisors (see below), whose sum is σ = 100152004392. Its totient is φ = 100094239672.

The previous prime is 100123122017. The next prime is 100123122067. The reversal of 100123122031 is 130221321001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130221321001 = 2371 ⋅54922531.

It is a cyclic number.

It is not a de Polignac number, because 100123122031 - 2⁹ = 100123121519 is a prime.

It is a super-2 number, since 2×100123122031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100123121996 and 100123122014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100123122131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14435980 + ... + 14442913.

It is an arithmetic number, because the mean of its divisors is an integer number (25038001098).

Almost surely, 2^100123122031 is an apocalyptic number.

100123122031 is a deficient number, since it is larger than the sum of its proper divisors (28882361).

100123122031 is an equidigital number, since it uses as much as digits as its factorization.

100123122031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28882360.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 100123122031 its reverse (130221321001), we get a palindrome (230344443032).

The spelling of 100123122031 in words is "one hundred billion, one hundred twenty-three million, one hundred twenty-two thousand, thirty-one".