100123123131021 has 8 divisors (see below), whose sum is σ = 133639970828224. Its totient is φ = 66677512093920.

The previous prime is 100123123130941. The next prime is 100123123131023. The reversal of 100123123131021 is 120131321321001.

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

It is not a de Polignac number, because 100123123131021 - 2¹³ = 100123123122829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100123123131023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17809161745 + ... + 17809167366.

It is an arithmetic number, because the mean of its divisors is an integer number (16704996353528).

Almost surely, 2^{100123123131021} is an apocalyptic number.

It is an amenable number.

100123123131021 is a deficient number, since it is larger than the sum of its proper divisors (33516847697203).

100123123131021 is an equidigital number, since it uses as much as digits as its factorization.

100123123131021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35618330051.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 100123123131021 its reverse (120131321321001), we get a palindrome (220254444452022).

The spelling of 100123123131021 in words is "one hundred trillion, one hundred twenty-three billion, one hundred twenty-three million, one hundred thirty-one thousand, twenty-one".