100031122111 has 4 divisors (see below), whose sum is σ = 100044331632. Its totient is φ = 100017912592.

The previous prime is 100031122099. The next prime is 100031122123. The reversal of 100031122111 is 111221130001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (100031122099) and next prime (100031122123).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100031122111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100031122091 and 100031122100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100031122151) 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, 6593395 + ... + 6608548.

It is an arithmetic number, because the mean of its divisors is an integer number (25011082908).

Almost surely, 2^100031122111 is an apocalyptic number.

100031122111 is a deficient number, since it is larger than the sum of its proper divisors (13209521).

100031122111 is an equidigital number, since it uses as much as digits as its factorization.

100031122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13209520.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 100031122111 its reverse (111221130001), we get a palindrome (211252252112).

The spelling of 100031122111 in words is "one hundred billion, thirty-one million, one hundred twenty-two thousand, one hundred eleven".