103111131031 has 4 divisors (see below), whose sum is σ = 104523612352. Its totient is φ = 101698649712.

The previous prime is 103111131029. The next prime is 103111131043. The reversal of 103111131031 is 130131111301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130131111301 = 17 ⋅7654771253.

It is a cyclic number.

It is not a de Polignac number, because 103111131031 - 2¹ = 103111131029 is a prime.

It is a super-2 number, since 2×103111131031² (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 = 103111130996 and 103111131014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103111131931) 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, 706240551 + ... + 706240696.

It is an arithmetic number, because the mean of its divisors is an integer number (26130903088).

Almost surely, 2^103111131031 is an apocalyptic number.

103111131031 is a deficient number, since it is larger than the sum of its proper divisors (1412481321).

103111131031 is an equidigital number, since it uses as much as digits as its factorization.

103111131031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412481320.

The product of its (nonzero) digits is 27, while the sum is 16.

Adding to 103111131031 its reverse (130131111301), we get a palindrome (233242242332).

The spelling of 103111131031 in words is "one hundred three billion, one hundred eleven million, one hundred thirty-one thousand, thirty-one".