100123030121 has 8 divisors (see below), whose sum is σ = 100221263688. Its totient is φ = 100024848000.

The previous prime is 100123030109. The next prime is 100123030171. The reversal of 100123030121 is 121030321001.

It can be written as a sum of positive squares in 4 ways, for example, as 1413721 + 100121616400 = 1189^2 + 316420^2 .

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 100123030121 - 2⁶ = 100123030057 is a prime.

It is a super-2 number, since 2×100123030121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100123030096 and 100123030105.

It is not an unprimeable number, because it can be changed into a prime (100123030171) 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, 4680911 + ... + 4702251.

It is an arithmetic number, because the mean of its divisors is an integer number (12527657961).

Almost surely, 2^100123030121 is an apocalyptic number.

It is an amenable number.

100123030121 is a deficient number, since it is larger than the sum of its proper divisors (98233567).

100123030121 is a wasteful number, since it uses less digits than its factorization.

100123030121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25723.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 100123030121 its reverse (121030321001), we get a palindrome (221153351122).

The spelling of 100123030121 in words is "one hundred billion, one hundred twenty-three million, thirty thousand, one hundred twenty-one".