31123013333311 has 4 divisors (see below), whose sum is σ = 31123081861672. Its totient is φ = 31122944804952.

The previous prime is 31123013333239. The next prime is 31123013333341. The reversal of 31123013333311 is 11333331032113.

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

It is a cyclic number.

It is not a de Polignac number, because 31123013333311 - 2¹⁵ = 31123013300543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31123013333311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123013333341) 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, 33578361 + ... + 34492786.

It is an arithmetic number, because the mean of its divisors is an integer number (7780770465418).

Almost surely, 2^{31123013333311} is an apocalyptic number.

31123013333311 is a deficient number, since it is larger than the sum of its proper divisors (68528361).

31123013333311 is an equidigital number, since it uses as much as digits as its factorization.

31123013333311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68528360.

The product of its (nonzero) digits is 4374, while the sum is 28.

Adding to 31123013333311 its reverse (11333331032113), we get a palindrome (42456344365424).

The spelling of 31123013333311 in words is "thirty-one trillion, one hundred twenty-three billion, thirteen million, three hundred thirty-three thousand, three hundred eleven".