100131103021 has 4 divisors (see below), whose sum is σ = 100306464544. Its totient is φ = 99955741500.

The previous prime is 100131102989. The next prime is 100131103027. The reversal of 100131103021 is 120301131001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120301131001 = 2203 ⋅54607867.

It is a cyclic number.

It is not a de Polignac number, because 100131103021 - 2⁵ = 100131102989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100131102992 and 100131103010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100131103027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87679905 + ... + 87681046.

It is an arithmetic number, because the mean of its divisors is an integer number (25076616136).

Almost surely, 2^100131103021 is an apocalyptic number.

It is an amenable number.

100131103021 is a deficient number, since it is larger than the sum of its proper divisors (175361523).

100131103021 is an equidigital number, since it uses as much as digits as its factorization.

100131103021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175361522.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 100131103021 its reverse (120301131001), we get a palindrome (220432234022).

The spelling of 100131103021 in words is "one hundred billion, one hundred thirty-one million, one hundred three thousand, twenty-one".