31211330120233 has 16 divisors (see below), whose sum is σ = 32350361047056. Its totient is φ = 30088047144960.

The previous prime is 31211330120209. The next prime is 31211330120249. The reversal of 31211330120233 is 33202103311213.

It can be written as a sum of positive squares in 8 ways, for example, as 575857875609 + 30635472244624 = 758853^2 + 5534932^2 .

It is a cyclic number.

It is not a de Polignac number, because 31211330120233 - 2³³ = 31202740185641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31211330120198 and 31211330120207.

It is not an unprimeable number, because it can be changed into a prime (31211330127233) 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 15 ways as a sum of consecutive naturals, for example, 10098385 + ... + 12821857.

It is an arithmetic number, because the mean of its divisors is an integer number (2021897565441).

Almost surely, 2^{31211330120233} is an apocalyptic number.

It is an amenable number.

31211330120233 is a deficient number, since it is larger than the sum of its proper divisors (1139030926823).

31211330120233 is a wasteful number, since it uses less digits than its factorization.

31211330120233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2726364.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 31211330120233 its reverse (33202103311213), we get a palindrome (64413433431446).

The spelling of 31211330120233 in words is "thirty-one trillion, two hundred eleven billion, three hundred thirty million, one hundred twenty thousand, two hundred thirty-three".