31213213311044 has 12 divisors (see below), whose sum is σ = 54785209715964. Its totient is φ = 15560296249344.

The previous prime is 31213213310941. The next prime is 31213213311053. The reversal of 31213213311044 is 44011331231213.

It can be written as a sum of positive squares in 2 ways, for example, as 21462020474944 + 9751192836100 = 4632712^2 + 3122690^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31213213310998 and 31213213311016.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11577600029 + ... + 11577602724.

It is an arithmetic number, because the mean of its divisors is an integer number (4565434142997).

Almost surely, 2^{31213213311044} is an apocalyptic number.

It is an amenable number.

31213213311044 is a deficient number, since it is larger than the sum of its proper divisors (23571996404920).

31213213311044 is a wasteful number, since it uses less digits than its factorization.

31213213311044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23155203094 (or 23155203092 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 31213213311044 its reverse (44011331231213), we get a palindrome (75224544542257).

The spelling of 31213213311044 in words is "thirty-one trillion, two hundred thirteen billion, two hundred thirteen million, three hundred eleven thousand, forty-four".