31121003111123 has 4 divisors (see below), whose sum is σ = 31121014276200. Its totient is φ = 31120991946048.

The previous prime is 31121003111113. The next prime is 31121003111189. The reversal of 31121003111123 is 32111130012113.

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 31121003111123 - 2²⁰ = 31121002062547 is a prime.

It is a super-2 number, since 2×31121003111123² (a number of 28 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 = 31121003111095 and 31121003111104.

It is not an unprimeable number, because it can be changed into a prime (31121003111113) 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, 2477603 + ... + 8269251.

It is an arithmetic number, because the mean of its divisors is an integer number (7780253569050).

Almost surely, 2^{31121003111123} is an apocalyptic number.

31121003111123 is a deficient number, since it is larger than the sum of its proper divisors (11165077).

31121003111123 is an equidigital number, since it uses as much as digits as its factorization.

31121003111123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11165076.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 31121003111123 its reverse (32111130012113), we get a palindrome (63232133123236).

The spelling of 31121003111123 in words is "thirty-one trillion, one hundred twenty-one billion, three million, one hundred eleven thousand, one hundred twenty-three".