100321111031 has 4 divisors (see below), whose sum is σ = 100321914000. Its totient is φ = 100320308064.

The previous prime is 100321110943. The next prime is 100321111081. The reversal of 100321111031 is 130111123001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 100321111031 - 2²² = 100316916727 is a prime.

It is a super-2 number, since 2×100321111031² (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 = 100321110997 and 100321111015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100321111081) 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, 169331 + ... + 478868.

It is an arithmetic number, because the mean of its divisors is an integer number (25080478500).

Almost surely, 2^100321111031 is an apocalyptic number.

100321111031 is a deficient number, since it is larger than the sum of its proper divisors (802969).

100321111031 is an equidigital number, since it uses as much as digits as its factorization.

100321111031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802968.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 100321111031 its reverse (130111123001), we get a palindrome (230432234032).

The spelling of 100321111031 in words is "one hundred billion, three hundred twenty-one million, one hundred eleven thousand, thirty-one".