31311012111101 has 4 divisors (see below), whose sum is σ = 31901785924572. Its totient is φ = 30720238297632.

The previous prime is 31311012111091. The next prime is 31311012111139. The reversal of 31311012111101 is 10111121011313.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7566344988601 + 23744667122500 = 2750699^2 + 4872850^2 .

It is a cyclic number.

It is not a de Polignac number, because 31311012111101 - 2²⁶ = 31310945002237 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 31311012111101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311012111151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295386906656 + ... + 295386906761.

It is an arithmetic number, because the mean of its divisors is an integer number (7975446481143).

Almost surely, 2^{31311012111101} is an apocalyptic number.

It is an amenable number.

31311012111101 is a deficient number, since it is larger than the sum of its proper divisors (590773813471).

31311012111101 is an equidigital number, since it uses as much as digits as its factorization.

31311012111101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590773813470.

The product of its (nonzero) digits is 18, while the sum is 17.

Adding to 31311012111101 its reverse (10111121011313), we get a palindrome (41422133122414).

The spelling of 31311012111101 in words is "thirty-one trillion, three hundred eleven billion, twelve million, one hundred eleven thousand, one hundred one".